z/2-3=7

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Solution for z/2-3=7 equation: 


z in (-oo:+oo)

z/2-3 = 7 // - 7

z/2-7-3 = 0

1/2*z-10 = 0 // + 10

1/2*z = 10 // : 1/2

z = 10/1/2

z = 20

z = 20

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