7-12=z/-7 - solution

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Solution for 7-12=z/-7 equation:

z in (-oo:+oo)

7-12 = z/(-7) // - z/(-7)

7-(z/(-7))-12 = 0

1/7*z-5 = 0 // + 5

1/7*z = 5 // : 1/7

z = 5/1/7

z = 35

z = 35

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