Mathematics
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OpenStudy (countryboy15):
help me solve some equation
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OpenStudy (countryboy15):
1.x – 6 = 8
2.y + 5 = –12
3. -2c= –18
OpenStudy (sophiaholder):
Okay so giving you the answer wouldn't help. You need to know how to do it.
OpenStudy (countryboy15):
i know thats why i asked help not tell
OpenStudy (sophiaholder):
Okay let me help.
OpenStudy (countryboy15):
ty and whos the mod here
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OpenStudy (sophiaholder):
My computer crashed sorry. Okay so for each equation, to solve for x you want to get it by itself.
OpenStudy (sophiaholder):
To do that, you need to remove the numbers on the side of the equation x is at.
OpenStudy (countryboy15):
ok
OpenStudy (sophiaholder):
For the first one, how would you get -6 to equal 0?
OpenStudy (sophiaholder):
Any idea?
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OpenStudy (countryboy15):
nope
OpenStudy (sophiaholder):
Okay so to get rid of negative numbers, you need to add a positive number to it.
OpenStudy (sophiaholder):
-6 + 6 = 0
OpenStudy (sophiaholder):
After you add that to the side of the equation x is on, you have to add it to the other side.
OpenStudy (countryboy15):
so it would be x=6
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OpenStudy (sophiaholder):
So, x-6 = 8
+6 +6
OpenStudy (countryboy15):
so x=2
OpenStudy (sophiaholder):
No, 6+8
OpenStudy (countryboy15):
wait no i got it x=14 ok
OpenStudy (sophiaholder):
Yep!
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OpenStudy (sophiaholder):
Now try to do the second one.
OpenStudy (countryboy15):
yeah so the same for the others????\
OpenStudy (sophiaholder):
Sorta.
OpenStudy (sophiaholder):
if you have a positive number that you need to get rid of, you need to subtract.
OpenStudy (countryboy15):
would it be y=-7
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OpenStudy (sophiaholder):
Close! If you are subtracting from a negative number, you need to add
OpenStudy (countryboy15):
or did i mis a step
OpenStudy (sophiaholder):
So -12 - 5 = -17
OpenStudy (sophiaholder):
Do you understand?
OpenStudy (countryboy15):
ok so then y=-17
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OpenStudy (sophiaholder):
Yep!
OpenStudy (sophiaholder):
Now can you do the last one?
OpenStudy (countryboy15):
what about this fractoin thisng its 1/4 a=3
OpenStudy (sophiaholder):
It is VERY different for the last one.
OpenStudy (sophiaholder):
Annoying I know, but when you have 3x that means it is 3*x right?
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OpenStudy (countryboy15):
can you help me with this one then ill do the last one 1/4 a=3
OpenStudy (sophiaholder):
*=multiply
OpenStudy (countryboy15):
right
OpenStudy (sophiaholder):
okay well to do that one, 1/4 * a = 3
OpenStudy (sophiaholder):
We can do two things here.
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OpenStudy (countryboy15):
so it would be a=12
OpenStudy (sophiaholder):
YES!
OpenStudy (sophiaholder):
Good job!
OpenStudy (countryboy15):
ok well thats easy
OpenStudy (sophiaholder):
So what do you do for the last one?
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OpenStudy (sophiaholder):
If it is multiplication, use division
OpenStudy (countryboy15):
ok l3ets see
OpenStudy (sophiaholder):
Keep the c alone and focus on the 3
OpenStudy (countryboy15):
so would it be c=-36
jw
OpenStudy (sophiaholder):
Okay, so no. If we have multiplication, we need to use division to get rid of the 3
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OpenStudy (sophiaholder):
or 2
OpenStudy (countryboy15):
no wait it would be c=-9 right
OpenStudy (sophiaholder):
Yep. Except remember that a negative/negative = positive
OpenStudy (sophiaholder):
So it would be 9
OpenStudy (countryboy15):
so it would be c=9 then right
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OpenStudy (sophiaholder):
Yep!
OpenStudy (countryboy15):
and can you help with 2 or 3 more thats all
OpenStudy (countryboy15):
heres the first 6.5 = –3 + n
OpenStudy (sophiaholder):
Of course!
OpenStudy (sophiaholder):
OKay so what do you think we would do first?
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OpenStudy (countryboy15):
um lets see
OpenStudy (countryboy15):
-3 make it 3
maybe
OpenStudy (sophiaholder):
Add 3 to both sides to get rid of -3. :)
OpenStudy (countryboy15):
so would be n=9.5 right??
OpenStudy (sophiaholder):
Yep!
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OpenStudy (countryboy15):
ok ty now 2 more please
OpenStudy (countryboy15):
then theres this 2/3x=6
OpenStudy (sophiaholder):
ok so what do you think we should do first. Hint: We will need to use multiplication and division for this one
OpenStudy (countryboy15):
sry crashed and um maybe divison
OpenStudy (sophiaholder):
Nope. IF we have a fraction beside the variable we need to get rid of the denominator.
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OpenStudy (sophiaholder):
To cancel out division, you need to use multiplication.
OpenStudy (countryboy15):
oh so how would it be like??
OpenStudy (sophiaholder):
So, to get rid of 3 we need to multiply by 3 on both sides.
OpenStudy (countryboy15):
would it be x=9
OpenStudy (sophiaholder):
Yes!! Good job!
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OpenStudy (countryboy15):
yes ty one more and again ty now i get it a lil more bc im home schooled and never get it thanks
OpenStudy (sophiaholder):
I'm homeschooled as well, so I understand.
OpenStudy (countryboy15):
x/4=12/6
OpenStudy (countryboy15):
thats awesome thanks for the help
OpenStudy (sophiaholder):
Okay so on this one I would simplify first.
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OpenStudy (sophiaholder):
12/6 is...?
OpenStudy (countryboy15):
2??
OpenStudy (sophiaholder):
Yeah lol.
OpenStudy (sophiaholder):
I just realized that was probably a stupid question I apologize.
OpenStudy (countryboy15):
so would be x=8
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OpenStudy (sophiaholder):
Yep!
OpenStudy (sophiaholder):
If you ever need anymore help, feel free to tag me if I am online.
OpenStudy (countryboy15):
lol thanks wish i could give more then one medal
OpenStudy (sophiaholder):
Algebra is one of my favorite subjects.
OpenStudy (countryboy15):
ok i will thanks
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OpenStudy (sophiaholder):
And here is a medal for getting those last ones on your own!
OpenStudy (countryboy15):
oh ty so much have a great one thanks
OpenStudy (sophiaholder):
No problem! You too!
OpenStudy (countryboy15):
yeah would have mostliky asked someone to give lol
OpenStudy (sophiaholder):
lol
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OpenStudy (countryboy15):
heres a word Q u think u could help
OpenStudy (countryboy15):
@sophiaholder
OpenStudy (countryboy15):
You need to make 18 cupcakes for a birthday party. You have already made 11. How many more cupcakes do you need to make? Write an equation and solve.