SOLUTION: Hi i need help on solving using substitution for two problems: x+y=1 2x+3y=-4 Please show all work thank you!

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Question 717492: Hi i need help on solving using substitution for two problems:
x+y=1
2x+3y=-4
Please show all work thank you!
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
y=-x+1
2x+3y=-4
2x+3(-x+1)=-4
2x-3x+3=-4
-x=-7
x=7
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2(7)+3y=-4
14+3y=-4
3y=-4-14
3y=-18
y=-18/3
y=-6
(7,-6)
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x+y=1
7-6=1