-x/2+13=20

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Solution for -x/2+13=20 equation: 


x in (-oo:+oo)

13-x/2 = 20 // - 20

13-x/2-20 = 0

-1/2*x-7 = 0 // + 7

-1/2*x = 7 // : -1/2

x = 7/(-1/2)

x = -14

x = -14

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