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(5/6)*x+2/5 = 2*x-(1/10) // - 2*x-(1/10)
(5/6)*x-(2*x)+2/5+1/10 = 0
(5/6)*x-2*x+2/5+1/10 = 0
1/2-7/6*x = 0 // - 1/2
-7/6*x = -1/2 // : -7/6
x = -1/2/(-7/6)
x = 3/7
x = 3/7
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