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(5*(7*x+2))/4 = 55 // - 55
(5*(7*x+2))/4-55 = 0
(5*(7*x+2))/4+(-55*4)/4 = 0
5*(7*x+2)-55*4 = 0
35*x-210 = 0
(35*x-210)/4 = 0
(35*x-210)/4 = 0 // * 4
35*x-210 = 0
35*x-210 = 0 // + 210
35*x = 210 // : 35
x = 210/35
x = 6
x = 6
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