-15=x+2x-9

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Solution for -15=x+2x-9 equation: 


x in (-oo:+oo)

-15 = x+2*x-9 // - x+2*x-9

9-x-(2*x)-15 = 0

9-x-2*x-15 = 0

-3*x-6 = 0 // + 6

-3*x = 6 // : -3

x = 6/(-3)

x = -2

x = -2

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