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2/7-7*x = 316/77 // - 316/77
2/7-7*x-(316/77) = 0
2/7-7*x-316/77 = 0
-7*x-42/11 = 0 // + 42/11
-7*x = 42/11 // : -7
x = 42/11/(-7)
x = -6/11
x = -6/11
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