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(1/2)*(2*x-5) = 4 // - 4
(1/2)*(2*x-5)-4 = 0
1/2*(2*x-5)-4 = 0
1/2*(2*x-5)-4 = 0
x-13/2 = 0
x-13/2 = 0
x-13/2 = 0 // + 13/2
x = 13/2
x = 13/2
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