Mathematics
8 Online
OpenStudy (anonymous):
Plz help with math!
7th grade math!
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OpenStudy (anonymous):
\[2k-10/-7\]
OpenStudy (anonymous):
k=_______
OpenStudy (anonymous):
@hero @myininaya
OpenStudy (anonymous):
@iGreen
OpenStudy (anonymous):
Plz help will give medal
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OpenStudy (anonymous):
@mathslover
OpenStudy (haleholmes):
Is there something on the other side of the equation?
OpenStudy (anonymous):
whoops ya sorry
OpenStudy (anonymous):
=8 is at the end
OpenStudy (haleholmes):
That would make it a lot easier. :)
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OpenStudy (haleholmes):
First PEMDAS, have you heard of it?
OpenStudy (anonymous):
yes
OpenStudy (haleholmes):
Okay. what would be the first step?
OpenStudy (anonymous):
parenthases then exponents which there are none
so multilpication
OpenStudy (anonymous):
multiplication*
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OpenStudy (haleholmes):
Yup. But it is along with division. You would need to get rid of the dividing (-7) first.So how would you get rid of -7?
OpenStudy (anonymous):
idk
OpenStudy (haleholmes):
negative x negative= positive
OpenStudy (haleholmes):
One sec
OpenStudy (anonymous):
ok
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OpenStudy (anonymous):
plz hurry i need to go
OpenStudy (haleholmes):
|dw:1421423819570:dw|
Look familiar?
OpenStudy (anonymous):
no
OpenStudy (haleholmes):
Then you need to add 10 to both sides. Then divide by 2.
OpenStudy (anonymous):
:( im stupid i dont get it
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OpenStudy (haleholmes):
Btw you should ask your teacher to explain this sort of thing better to you.
OpenStudy (haleholmes):
Multiply the -7 on both sides, then follow my comment after the pic.
If you want me to explain it better after school, tag me.
OpenStudy (anonymous):
? i still dont get it
OpenStudy (anonymous):
plz help me
OpenStudy (haleholmes):
Okay, write down the equation.
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OpenStudy (haleholmes):
Then to get rid of the -7 you need to multiply both sides of the equation by -7. That will cancel it out on the side of k and keep the equation equal.
OpenStudy (haleholmes):
So you will need to multiply 8 * (-7)
OpenStudy (haleholmes):
Then you will end up with \[-56 = 2k -10\]
OpenStudy (anonymous):
-56
OpenStudy (haleholmes):
Yup. Then you add 10 to both sides.
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OpenStudy (anonymous):
-46=12 or 12k
OpenStudy (anonymous):
no wait -46=k right?
OpenStudy (haleholmes):
No. Adding 10 to the side subtracting 10 would just leave 2k
OpenStudy (anonymous):
i did add 10
OpenStudy (haleholmes):
It should be \[-46 = 2k\]
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OpenStudy (anonymous):
oh ok
OpenStudy (haleholmes):
You added 10 to 2k, which you can't do because 10 and 2k do not match
OpenStudy (haleholmes):
Now you need to divide both sides by 2 and there's your answer.
OpenStudy (anonymous):
k=-23
OpenStudy (haleholmes):
Yup. Good job.
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OpenStudy (anonymous):
Ty for helping me
OpenStudy (haleholmes):
No prob. Btw you will want to ask your teacher to teach you this better, because it only gets harder.
OpenStudy (anonymous):
ok