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(1/2)*(9-(3*x))-((3/4)*x)-3 = 0
(1/2)*(9-3*x)+(-3/4)*x-3 = 0
1/2*(9-3*x)+(-3*x)/4-3 = 0
(1/2*4*(9-3*x))/4+(-3*x)/4+(-3*4)/4 = 0
1/2*4*(9-3*x)-3*x-3*4 = 0
18-9*x-12 = 0
6-9*x = 0
(6-9*x)/4 = 0
(6-9*x)/4 = 0 // * 4
6-9*x = 0
6-9*x = 0 // - 6
-9*x = -6 // : -9
x = -6/(-9)
x = 2/3
x = 2/3
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