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10-((5/6)*x)-(5*x) = -40/3 // + -40/3
10-((5/6)*x)-(5*x)-(-40/3) = 0
(-5/6)*x-5*x+40/3+10 = 0
70/3-35/6*x = 0 // - 70/3
-35/6*x = -70/3 // : -35/6
x = -70/3/(-35/6)
x = 4
x = 4
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