2z/7-4=-5

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Solution for 2z/7-4=-5 equation: 


z in (-oo:+oo)

(2*z)/7-4 = -5 // + 5

(2*z)/7-4+5 = 0

2/7*z+1 = 0 // - 1

2/7*z = -1 // : 2/7

z = -1/2/7

z = -7/2

z = -7/2

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