Question 241349
x + 7y = -2 multiply by -3 & add
3x + y = 34
-3x-21y=6
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-20y=40
y=40/-20
y=-2 ans.
x+7*-2=-2
x-14=-2
x=-2+14
x=12 ans.
3*12-2=34
36-2=34
34=34