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(1/2)*(x-4) = 5 // - 5
(1/2)*(x-4)-5 = 0
1/2*(x-4)-5 = 0
1/2*(x-4)-5 = 0
1/2*x-7 = 0
1/2*x-7 = 0
1/2*x-7 = 0 // + 7
1/2*x = 7 // : 1/2
x = 7/1/2
x = 14
x = 14
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