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x in (-oo:+oo)
2*x-(3/5) = 4 // - 4
2*x-(3/5)-4 = 0
2*x-3/5-4 = 0
2*x-23/5 = 0 // + 23/5
2*x = 23/5 // : 2
x = 23/5/2
x = 23/10
x = 23/10
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