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Anonymous
X=-3
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3x-1=11 3x = 12 x = 4 Then, x^2 +x = 20.
2x-12
3x+8 = 12 3x = 4 x = 4/3
3x+42=6x+12 42=6x-3x+12 42=3x+12 42-12=3x 30=3x 10=x
Point slope equation: Y=3X+12