3z/7-8=-1

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Solution for 3z/7-8=-1 equation: 


z in (-oo:+oo)

(3*z)/7-8 = -1 // + 1

(3*z)/7-8+1 = 0

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

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

z = 7/3/7

z = 49/3

z = 49/3

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