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(1/2)*(10*x-4)-x-8 = 0
1/2*(10*x-4)-x-8 = 0
1/2*(10*x-4)-x-8 = 0
4*x-8-2 = 0
4*x-10 = 0
4*x-10 = 0
4*x-10 = 0 // + 10
4*x = 10 // : 4
x = 10/4
x = 5/2
x = 5/2
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