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67/8 = 5*x+(5/6)*x+4 // - 5*x+(5/6)*x+4
67/8-(5*x)-((5/6)*x)-4 = 0
(-5/6)*x-5*x+67/8-4 = 0
35/8-35/6*x = 0 // - 35/8
-35/6*x = -35/8 // : -35/6
x = -35/8/(-35/6)
x = 3/4
x = 3/4
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