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