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OpenStudy (anonymous):
i am having a little trouble solving this one
OpenStudy (turingtest):
one thing is that it's a lot easier on the eyes if you don't use caps
OpenStudy (anonymous):
wow can you explain how to do that
OpenStudy (anonymous):
x+{y-3-4x+2[3x-(-y-1)+2y]-3x} = ?
OpenStudy (turingtest):
I edited your post for you :)
anyway, we work here from the inside out
so what is the first (innermost) operation?
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OpenStudy (anonymous):
i saw that
OpenStudy (anonymous):
(-y-1)
OpenStudy (turingtest):
right, and there's not much we can do with that...
so on to the next step
we now look at it as\[3x-(-y-1)+2y\]do you know how to simplify this?
OpenStudy (anonymous):
i believe it is 3x+y+1+2y
then
3x+2y+1
OpenStudy (turingtest):
yep :)
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OpenStudy (anonymous):
i meant 3y
OpenStudy (turingtest):
ph, so did I lol
OpenStudy (turingtest):
so what is the next step outside of that?
OpenStudy (anonymous):
3x+3y+1
OpenStudy (turingtest):
x+{y-3-4x+2[3x-(-y-1)+2y]-3x}
and we got that now to be
x+{y-3-4x+2[3x+3y+1]-3x}
so what is the innermost step we should do
(careful on this one)
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OpenStudy (anonymous):
{y-3-4x+2[3x+3y+1]-3x}
OpenStudy (anonymous):
right?
OpenStudy (turingtest):
almost.... and that can work, but we can make it even simpler
the first thing to be done (the innermost operation) is to distribute the 2:
2[3x+3y+1]
OpenStudy (anonymous):
yah i know thats what i meant
OpenStudy (turingtest):
good
so simplify that and tell me what you get
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OpenStudy (anonymous):
ok we will see?
OpenStudy (anonymous):
2[3x+3y+1]
which is
6x +6y +2
OpenStudy (turingtest):
good, so now substitute that into the next outer expression
(the one you wrote before)
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
x+y-3-4x+6x +6y +2-3x
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OpenStudy (turingtest):
great, and now we simplify that....
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
+7y - 1?
OpenStudy (anonymous):
am i right?
OpenStudy (turingtest):
no be more careful with your like terms
what are just all the x's added up?
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OpenStudy (turingtest):
oh wait I'm sorry I mistyped my own paper
(mulitptasking)
OpenStudy (anonymous):
:( my book says i am right
OpenStudy (turingtest):
oh I see you took the last step already which is to add the final outer x
well good job, yes, that is the final answer
OpenStudy (anonymous):
ok well can we try one more to make sure i learned everything well. if not thats fine you earned your medal?
OpenStudy (turingtest):
I'm never in it for the medals :)
but you're still supposed to post separate each Q as per the code of conduct
In this case we can do one more quickly here
as I said, I'm multitasking
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OpenStudy (anonymous):
ok lol i guess i wouldnt be in the medals either if i had your score
OpenStudy (anonymous):
ok next one
OpenStudy (turingtest):
go ahead
OpenStudy (anonymous):
6+{-a-3[b+6(a-b)+4a]-2b=?
OpenStudy (turingtest):
where to the brackets close {} ?
(you forgot the right one)
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OpenStudy (turingtest):
where do*....
OpenStudy (anonymous):
oh my bad after 2b
OpenStudy (anonymous):
6+{-a-3[b+6(a-b)+4a]-2b}=?
OpenStudy (turingtest):
so what is the first innermost operation?
OpenStudy (anonymous):
a-b
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OpenStudy (turingtest):
right, but we can't simplify that, so what's the next outer operation
(again, like last time, be careful here)
OpenStudy (anonymous):
6+{-a-3[b+6(a-b)+4a]-2b}=?
then
[b+6a-6b+4a]
OpenStudy (turingtest):
yes
OpenStudy (turingtest):
continue
OpenStudy (anonymous):
ok so now
6+{-a-3[b+6a-6b+4a]-2b}=?
then
[10a-5b]
then
-3[10a-5b]=
-30a+15b
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OpenStudy (turingtest):
so far so good
OpenStudy (anonymous):
so now we have
6+{-31a+17b}=?
solve it now
6-31a+17b
fix it up a bit...
-31a+17b+6
am I right ,am I ,am I?
OpenStudy (anonymous):
wait
OpenStudy (anonymous):
6+{-31a+13b}=?
solve it now
6-31a+13b
fix it up a bit...
-31a+13b+6
am I right ,am I ,am I?
OpenStudy (anonymous):
check that out
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