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7*(x-(1/2)) = (1/5)*(x/2+1) // - (1/5)*(x/2+1)
7*(x-(1/2))-((1/5)*(x/2+1)) = 0
7*(x-1/2)+(-1/5)*(x/2+1) = 0
7*(x-1/2)-1/5*(1/2*x+1) = 0
7*(x-1/2)-1/5*(1/2*x+1) = 0
69/10*x-37/10 = 0
69/10*x-37/10 = 0
69/10*x-37/10 = 0 // + 37/10
69/10*x = 37/10 // : 69/10
x = 37/10/69/10
x = 37/69
x = 37/69
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