-1+1/2X=-7

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Solution for -1+1/2X=-7 equation: 


X in (-oo:+oo)

(1/2)*X-1 = -7 // + 7

(1/2)*X-1+7 = 0

1/2*X+6 = 0 // - 6

1/2*X = -6 // : 1/2

X = -6/1/2

X = -12

X = -12

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