7-11=z/-9 - solution

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Solution for 7-11=z/-9 equation:

z in (-oo:+oo)

7-11 = z/(-9) // - z/(-9)

7-(z/(-9))-11 = 0

1/9*z-4 = 0 // + 4

1/9*z = 4 // : 1/9

z = 4/1/9

z = 36

z = 36

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