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(5*x+14)/3 = 13 // - 13
(5*x+14)/3-13 = 0
(5*x+14)/3+(-13*3)/3 = 0
5*x-13*3+14 = 0
5*x-25 = 0
(5*x-25)/3 = 0
(5*x-25)/3 = 0 // * 3
5*x-25 = 0
5*x-25 = 0 // + 25
5*x = 25 // : 5
x = 25/5
x = 5
x = 5
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