-7=z/-3

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Solution for -7=z/-3 equation: 


z in (-oo:+oo)

-7 = z/(-3) // - z/(-3)

-(z/(-3))-7 = 0

1/3*z-7 = 0 // + 7

1/3*z = 7 // : 1/3

z = 7/1/3

z = 21

z = 21

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