-2/5z=-1

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Solution for -2/5z=-1 equation: 


z in (-oo:+oo)

(-2/5)*z = -1 // + 1

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

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

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

z = -1/(-2/5)

z = 5/2

z = 5/2

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