Z/7-9=4

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Solution for Z/7-9=4 equation: 


Z in (-oo:+oo)

Z/7-9 = 4 // - 4

Z/7-9-4 = 0

1/7*Z-13 = 0 // + 13

1/7*Z = 13 // : 1/7

Z = 13/1/7

Z = 91

Z = 91

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