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(1/2)*x = (3/4)*x-(6/4) // - (3/4)*x-(6/4)
(1/2)*x-((3/4)*x)+6/4 = 0
(1/2)*x+(-3/4)*x+6/4 = 0
3/2-1/4*x = 0 // - 3/2
-1/4*x = -3/2 // : -1/4
x = -3/2/(-1/4)
x = 6
x = 6
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