7=9-z/5

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Solution for 7=9-z/5 equation: 


z in (-oo:+oo)

7 = 9-(z/5) // - 9-(z/5)

z/5-9+7 = 0

1/5*z-2 = 0 // + 2

1/5*z = 2 // : 1/5

z = 2/1/5

z = 10

z = 10

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