-x/3+9=1x+21

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Solution for -x/3+9=1x+21 equation: 


x in (-oo:+oo)

9-x/3 = 1*x+21 // - 1*x+21

9-x/3-(1*x)-21 = 0

9-x/3-x-21 = 0

-4/3*x-12 = 0 // + 12

-4/3*x = 12 // : -4/3

x = 12/(-4/3)

x = -9

x = -9

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