z/9-13=12 - solution

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Solution for z/9-13=12 equation:

z in (-oo:+oo)

z/9-13 = 12 // - 12

z/9-13-12 = 0

1/9*z-25 = 0 // + 25

1/9*z = 25 // : 1/9

z = 25/1/9

z = 225

z = 225

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