SOLUTION: Solve each system by addition
2x = 2 - y
3x + y = -1
Thanks
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Question 178868: Solve each system by addition
2x = 2 - y
3x + y = -1
Thanks
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
2x = 2 - y
3x + y = -1
.
Begin by rearranging the 1st equation:
2x + y = 2
3x + y = -1
.
Multiply both sides of the 1st equation by -1:
-2x - y = -2
3x + y = -1
.
Now, add the two equations together:
-2x - y = -2
3x + y = -1
----------------
x = -3 (solution for x)
.
To find y, substitute the above into equation 1 and solve for y:
2x + y = 2
2(-3) + y = 2
-6 + y = 2
y = 8 (solution for y)
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