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(2*x)/3-11 = 20-(x/5)-x-(10/4) // - 20-(x/5)-x-(10/4)
(2*x)/3+x/5+x+10/4-20-11 = 0
28/15*x-57/2 = 0 // + 57/2
28/15*x = 57/2 // : 28/15
x = 57/2/28/15
x = 855/56
x = 855/56
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