-5-15=z/-7

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Solution for -5-15=z/-7 equation: 


z in (-oo:+oo)

-15-5 = z/(-7) // - z/(-7)

-(z/(-7))-15-5 = 0

1/7*z-20 = 0 // + 20

1/7*z = 20 // : 1/7

z = 20/1/7

z = 140

z = 140

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