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(1/2)*x+(1/4)*x = 1/6-(1/4) // - 1/6-(1/4)
(1/2)*x+(1/4)*x-(1/6)+1/4 = 0
(1/2)*x+(1/4)*x-1/6+1/4 = 0
3/4*x+1/12 = 0 // - 1/12
3/4*x = -1/12 // : 3/4
x = -1/12/3/4
x = -1/9
x = -1/9
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