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(2/7)*x+2/7 = 22/63 // - 22/63
(2/7)*x+2/7-(22/63) = 0
(2/7)*x+2/7-22/63 = 0
2/7*x-4/63 = 0 // + 4/63
2/7*x = 4/63 // : 2/7
x = 4/63/2/7
x = 2/9
x = 2/9
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