(12-x)/3=9

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Solution for (12-x)/3=9 equation: 


x in (-oo:+oo)

(12-x)/3 = 9 // - 9

(12-x)/3-9 = 0

(12-x)/3+(-9*3)/3 = 0

12-x-9*3 = 0

-x-15 = 0

(-x-15)/3 = 0

(-x-15)/3 = 0 // * 3

-x-15 = 0

-x-15 = 0 // + 15

-x = 15 // * -1

x = -15

x = -15

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