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(3*x)/7-(2/6) = 10/7 // - 10/7
(3*x)/7-(2/6)-(10/7) = 0
(3*x)/7-1/3-10/7 = 0
3/7*x-37/21 = 0 // + 37/21
3/7*x = 37/21 // : 3/7
x = 37/21/3/7
x = 37/9
x = 37/9
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