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OpenStudy (anonymous):
Solve by Substitution: 2x + y = 0 x – 3y = -7
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OpenStudy (anonymous):
2x+y=0 -2(x-3y=7) have : 2x+y=0 -2x+6y=14 Now sum : -2x+2x+6y+y=14+0 have : 7y=12 y=2 Understood ?:)
OpenStudy (anonymous):
And for find x : 2x+y=0 2x+2=0 x=1
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
Welcome boy .
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