GRE Math Review 2 ALGEBRA - ETS Home

When the two machines work together, adding their individual production rates, one third and one half, gives their combined production rate 1 over x. Therefore, it follows that . one third, +, one half, =, 1 over x. This equation is equivalent to 2 over 6, +, 3 over 6, =, 1 over x. So 5 over 6, =, 1 … ................
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