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2*(x-5) = (1/2)*x // - (1/2)*x
2*(x-5)-((1/2)*x) = 0
2*(x-5)+(-1/2)*x = 0
2*(x-5)-x/2 = 0
(2^2*(x-5))/2-x/2 = 0
2^2*(x-5)-x = 0
3*x-20 = 0
(3*x-20)/2 = 0
(3*x-20)/2 = 0 // * 2
3*x-20 = 0
3*x-20 = 0 // + 20
3*x = 20 // : 3
x = 20/3
x = 20/3
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