-2/7z=4/20

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Solution for -2/7z=4/20 equation: 


z in (-oo:+oo)

(-2/7)*z = 4/20 // - 4/20

(-2/7)*z-(4/20) = 0

(-2/7)*z-1/5 = 0

-2/7*z-1/5 = 0 // + 1/5

-2/7*z = 1/5 // : -2/7

z = 1/5/(-2/7)

z = -7/10

z = -7/10

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