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2/7-(x/8) = (3*x)/8 // - (3*x)/8
2/7-(x/8)-((3*x)/8) = 0
(-3/8)*x-(x/8)+2/7 = 0
2/7-1/2*x = 0 // - 2/7
-1/2*x = -2/7 // : -1/2
x = -2/7/(-1/2)
x = 4/7
x = 4/7
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