Problem: Y=-3x+6 x+y=8
I need help solving this problem with elimination..
y = -3x + 6
3x + y = 6
x + y = 8
Eliminate y by subtracting the second equation
from the first (re-written) equation...
3x + y = 6
-(x + y = 8)
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2x = -2
2x = -2
x = -1
Now, solve for y.
y = -3x + 6
y = -3(-1) + 6
y = 3 + 6
y = 9
Check by using the second equation.
x + y = 8
-1 + 9 = 8
8 = 8
Answer: x = -1, y = 9