-1=(5+X)/2

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Solution for -1=(5+X)/2 equation: 


X in (-oo:+oo)

-1 = (X+5)/2 // - (X+5)/2

-((X+5)/2)-1 = 0

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

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

-1*(X+5)-1*2 = 0

-X-7 = 0

(-X-7)/2 = 0

(-X-7)/2 = 0 // * 2

-X-7 = 0

-X-7 = 0 // + 7

-X = 7 // * -1

X = -7

X = -7

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