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(1/2)*x-(2*x)-4 = -11/2 // + -11/2
(1/2)*x-(2*x)-(-11/2)-4 = 0
(1/2)*x-2*x+11/2-4 = 0
3/2-3/2*x = 0 // - 3/2
-3/2*x = -3/2 // : -3/2
x = -3/2/(-3/2)
x = 1
x = 1
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