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(2/7)*x+1/3 = 55/147 // - 55/147
(2/7)*x+1/3-(55/147) = 0
(2/7)*x+1/3-55/147 = 0
2/7*x-2/49 = 0 // + 2/49
2/7*x = 2/49 // : 2/7
x = 2/49/2/7
x = 1/7
x = 1/7
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