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(2*x)/4+x-(3/5) = 7/10 // - 7/10
(2*x)/4+x-(3/5)-(7/10) = 0
(2*x)/4+x-3/5-7/10 = 0
3/2*x-13/10 = 0 // + 13/10
3/2*x = 13/10 // : 3/2
x = 13/10/3/2
x = 13/15
x = 13/15
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