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(2/5)*x+(1/6)*x = (3/10)*x+1/3 // - (3/10)*x+1/3
(2/5)*x+(1/6)*x-((3/10)*x)-(1/3) = 0
(2/5)*x+(1/6)*x+(-3/10)*x-1/3 = 0
4/15*x-1/3 = 0 // + 1/3
4/15*x = 1/3 // : 4/15
x = 1/3/4/15
x = 5/4
x = 5/4
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