z/9-12=4 - solution

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Solution for z/9-12=4 equation:

z in (-oo:+oo)

z/9-12 = 4 // - 4

z/9-12-4 = 0

1/9*z-16 = 0 // + 16

1/9*z = 16 // : 1/9

z = 16/1/9

z = 144

z = 144

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