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(5/7)*x-2*x-(2/5) = -29/35 // + -29/35
(5/7)*x-2*x-(2/5)-(-29/35) = 0
(5/7)*x-2*x-2/5+29/35 = 0
3/7-9/7*x = 0 // - 3/7
-9/7*x = -3/7 // : -9/7
x = -3/7/(-9/7)
x = 1/3
x = 1/3
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