x/5-9=12 - solution

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Solution for x/5-9=12 equation:

x in (-oo:+oo)

x/5-9 = 12 // - 12

x/5-12-9 = 0

1/5*x-21 = 0 // + 21

1/5*x = 21 // : 1/5

x = 21/1/5

x = 105

x = 105

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