1/-2z+5=7

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Solution for 1/-2z+5=7 equation: 


z in (-oo:+oo)

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

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

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

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

z = 2/(-1/2)

z = -4

z = -4

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