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X in (-oo:+oo)
(-1/4)*(X-8)+(1/2)*(X+2) = 0
1/2*(X+2)-1/4*(X-8) = 0
1/2*(X+2)-1/4*(X-8) = 0
1/4*X+3 = 0
1/4*X+3 = 0
1/4*X+3 = 0 // - 3
1/4*X = -3 // : 1/4
X = -3/1/4
X = -12
X = -12
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