SOLUTION: I trying to learn elimination and substitution my problem is (3x + 3y = -1 2x - 2y = 5

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Question 290561: I trying to learn elimination and substitution
my problem is
(3x + 3y = -1
2x - 2y = 5
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
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
------------
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