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(2*x)/7-(2/7)-(10/7) = 0
(2*x)/7-2/7-10/7 = 0
2/7*x-12/7 = 0 // + 12/7
2/7*x = 12/7 // : 2/7
x = 12/7/2/7
x = 6
x = 6
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