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OpenStudy (anonymous):
-7x+y=-20 9x-3y=36
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OpenStudy (xxdragoonxx):
-7x+y=-20 y=-20+7x y=7x−20 9*x−3*(7*x−20)=36 9x−3*(7x−20)=36 9x+-3*7x−3*-20=36 9x−21x+60=36 -12x+60=36 -12x=36−60 -12x=-24 X=-24/-12 x=2 y=7*2−20 y=14−20 Y=-6
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