GRE Math Review 2 ALGEBRA - ETS Home

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 over x, and, 6 over 5, =, x. Thus, working together, the machines will take 6 over 5 hours, or 1 hour 12 minutes, to produce a batch of parts. ................
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