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4*x-(1/2) = 7/5 // - 7/5
4*x-(1/2)-(7/5) = 0
4*x-1/2-7/5 = 0
4*x-19/10 = 0 // + 19/10
4*x = 19/10 // : 4
x = 19/10/4
x = 19/40
x = 19/40
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