Question 185602
3x-y=8 multiply this equation by -1 & add them.
4x-y=-15
-3x+y=-8
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x=-23 ans.
3*-23-y=8
-69-y=8
-y=8+69
-y=77
y=-77 ans.
Proof:
4*-23-(-77)=-15
-92+77=-15
-15=-15