z/20=-7

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Solution for z/20=-7 equation: 


z in (-oo:+oo)

z/20 = -7 // + 7

z/20+7 = 0

1/20*z+7 = 0 // - 7

1/20*z = -7 // : 1/20

z = -7/1/20

z = -140

z = -140

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