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7*x-(2*x)-(3/6)-(3/4) = 5/4 // - 5/4
7*x-(2*x)-(3/6)-(3/4)-(5/4) = 0
7*x-2*x-1/2-3/4-5/4 = 0
5*x-5/2 = 0 // + 5/2
5*x = 5/2 // : 5
x = 5/2/5
x = 1/2
x = 1/2
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