y = x + 4 y = 2x + 5
y=2x+3
y = 3x - 2 y = -x - 2
y=4x-7
y = -3 x = 5
y=-x+3
y = (1/3)x - 3 2x - y = 8
y=9x
y - 3x = 3 y = 3x - 2
x=4
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