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(5/6)*x+(2/3)*x-(7/4) = 2*x+(1/3)*x-(5/12) // - 2*x+(1/3)*x-(5/12)
(5/6)*x+(2/3)*x-(2*x)-((1/3)*x)-(7/4)+5/12 = 0
(5/6)*x+(2/3)*x-2*x+(-1/3)*x-7/4+5/12 = 0
-5/6*x-4/3 = 0 // + 4/3
-5/6*x = 4/3 // : -5/6
x = 4/3/(-5/6)
x = -8/5
x = -8/5
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