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(3*x)/13+5/13 = (2*x)/13-4 // - (2*x)/13-4
(3*x)/13-((2*x)/13)+5/13+4 = 0
(3*x)/13+(-2/13)*x+5/13+4 = 0
1/13*x+57/13 = 0 // - 57/13
1/13*x = -57/13 // : 1/13
x = -57/13/1/13
x = -57
x = -57
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