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(5/7)*x+2 = (1/3)*x+74/21 // - (1/3)*x+74/21
(5/7)*x-((1/3)*x)-(74/21)+2 = 0
(5/7)*x+(-1/3)*x-74/21+2 = 0
8/21*x-32/21 = 0 // + 32/21
8/21*x = 32/21 // : 8/21
x = 32/21/8/21
x = 4
x = 4
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