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Mathematics 13 Online
OpenStudy (anonymous):

x-y=7 -2x+y=-12

jimthompson5910 (jim_thompson5910):

x-y=7 -2x+y=-12 ------------ -x=-5 x=5 x-y=7 5-y=7 -y=7-5 -y=2 y=-2 So x=5 and y=-2

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