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(1/2)*x-x+2 = 3/4 // - 3/4
(1/2)*x-x-(3/4)+2 = 0
(1/2)*x-x-3/4+2 = 0
5/4-1/2*x = 0 // - 5/4
-1/2*x = -5/4 // : -1/2
x = -5/4/(-1/2)
x = 5/2
x = 5/2
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