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(1/2)*(6*x+4) = 2*x-11 // - 2*x-11
(1/2)*(6*x+4)-(2*x)+11 = 0
(1/2)*(6*x+4)-2*x+11 = 0
1/2*(6*x+4)-2*x+11 = 0
1/2*(6*x+4)-2*x+11 = 0
x+2+11 = 0
x+13 = 0
x+13 = 0
x+13 = 0 // - 13
x = -13
x = -13
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