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OpenStudy (anonymous):
*MEDAL* Can somebody please help me with this?
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OpenStudy (♪chibiterasu):
Your question?
OpenStudy (anonymous):
OpenStudy (anonymous):
multiply the top equation by -4
OpenStudy (anonymous):
12x+4y=40 then add the two equations together
OpenStudy (anonymous):
ooh, I see what you did now. one sec
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OpenStudy (anonymous):
16x + y = 48?
OpenStudy (anonymous):
there would be no y because they would cancel.
OpenStudy (anonymous):
16x = 48 devide 16 by each side. x = 3, right?
OpenStudy (anonymous):
Yep! then plug 3 in to one of the equations to get y
OpenStudy (anonymous):
uuh, i did this but it doesn't look right. -3(3) - y = -10
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OpenStudy (anonymous):
thats right.
OpenStudy (anonymous):
so -9 = -10...?
OpenStudy (anonymous):
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