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20*((2*x)/60+2) = 20*((5*x)/60+1.5) // - 20*((5*x)/60+1.5)
20*((2*x)/60+2)-(20*((5*x)/60+1.5)) = 0
20*((2*x)/60+2)-20*((5*x)/60+1.5) = 0
20*(1/30*x+2)-20*(1/12*x+1.5) = 0
20*(1/30*x+2)-20*(1/12*x+1.5) = 0
10-x = 0
10-x = 0
10-x = 0 // - 10
-x = -10 // * -1
x = 10
x = 10
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