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(2*x)/5-(x/3) = 4/7 // - 4/7
(2*x)/5-(x/3)-(4/7) = 0
(2*x)/5-(x/3)-4/7 = 0
1/15*x-4/7 = 0 // + 4/7
1/15*x = 4/7 // : 1/15
x = 4/7/1/15
x = 60/7
x = 60/7
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