3-18=z/-7

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Solution for 3-18=z/-7 equation: 


z in (-oo:+oo)

3-18 = z/(-7) // - z/(-7)

3-(z/(-7))-18 = 0

1/7*z-15 = 0 // + 15

1/7*z = 15 // : 1/7

z = 15/1/7

z = 105

z = 105

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