z/2-15=20 - solution

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Solution for z/2-15=20 equation:

z in (-oo:+oo)

z/2-15 = 20 // - 20

z/2-20-15 = 0

1/2*z-35 = 0 // + 35

1/2*z = 35 // : 1/2

z = 35/1/2

z = 70

z = 70

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