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(1/4)*(x+1/2) = (1/2)*(x/3-3) // - (1/2)*(x/3-3)
(1/4)*(x+1/2)-((1/2)*(x/3-3)) = 0
(1/4)*(x+1/2)+(-1/2)*(x/3-3) = 0
1/4*(x+1/2)-1/2*(1/3*x-3) = 0
1/4*(x+1/2)-1/2*(1/3*x-3) = 0
1/12*x+13/8 = 0
1/12*x+13/8 = 0
1/12*x+13/8 = 0 // - 13/8
1/12*x = -13/8 // : 1/12
x = -13/8/1/12
x = -39/2
x = -39/2
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