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(2*x)/7 = 16/8 // - 16/8
(2*x)/7-(16/8) = 0
(2*x)/7-2 = 0
2/7*x-2 = 0 // + 2
2/7*x = 2 // : 2/7
x = 2/2/7
x = 7
x = 7
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