Question 290561
Elimination method:
3x+3y=-1 multiply this equation by 2.
2x-2y=5  multiply this equation by 3 & add.
6x+6y=-2
6x-6y=15
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12x=13
x=13/12 ans.
3*13/12+3y=-1
39/12+3y=-1
3y=-1-39/12
3y=-1-13/4
3y=-4/4-13/4
3y=-17/4
y=(-17/4)/3
y=-17/4*1/3
y=-17/12 ans.
Proof:
2(13/12)-2(-17/12)=5
26/12+34/12=5
60/12=5
5=5