1)
y = -5x + 2
y = 3x - 14
Set them both equal to each other since both are equal to y.
-5x + 2 = 3x - 14
+5x +5x
2 = 8x -14
+14 +14
16 = 8x
x = 2
y = 3(2)- 14 = -8
2)
x+y=0
5x+y=4
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Multiply the top by -1
-x - y = 0
5x + y = 4
Add the two equations.
5x-x = 4x, y - y = 0, 4 + 0 = 4
4x = 4
x = 1
5(1) + y = 4
5 + y = 4
-5 -5
y = -1
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