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OpenStudy (anonymous):
2x+7y=-3 -9x+y=46
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OpenStudy (anonymous):
too many equal signs
OpenStudy (anonymous):
oh my fault i see
\[2x+7y=-3\]
\[-9x+y=46\] sorry
OpenStudy (anonymous):
you want elimination or substitution ?
OpenStudy (anonymous):
Substitution
OpenStudy (anonymous):
then solve second equation for y, because it is easiest
\[-9x+y=46\]
\[y=9x+46\] and substitute into first equation
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OpenStudy (anonymous):
2x+7y=-3 (*9) -----> 18x+63y=-27
-9x+y=46 (*2) -----> -18x+2y=92 <=> 65y=65 <=>y=1
OpenStudy (anonymous):
2x+7*1=-3 => 2x=-10 => x=-5
OpenStudy (anonymous):
You are welcome :p
OpenStudy (anonymous):
\[2x+7y=-3\]
\[2x+7(9x+46)=-3\]
\[65x+322=-3\]
\[65x=-325\]
\[x=-5\]
OpenStudy (anonymous):
the find y by substitution.
Alexis got right answer using elimination. doesn't matter which you use
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OpenStudy (anonymous):
We are both great ^^
OpenStudy (anonymous):
Yes, You both are.
I just wish I could understand this better... still confused :/
OpenStudy (anonymous):
what would an ordered pair be?
OpenStudy (anonymous):
Just write what I am writing and if you still have any questions tell me.
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