12=x/4-9 - solution

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Solution for 12=x/4-9 equation:

x in (-oo:+oo)

12 = x/4-9 // - x/4-9

9-(x/4)+12 = 0

21-1/4*x = 0 // - 21

-1/4*x = -21 // : -1/4

x = -21/(-1/4)

x = 84

x = 84

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