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