One computer can process the income and payroll of a company in 7 hours. A newer computer can process it in 5 hours. Which equation could be used to find how long it will take to process the income and payroll if both computers are used?

I said 1/7+1/5=1/x am i right?

Question

One computer can process the income and payroll of a company in 7 hours. A newer computer can process it in 5 hours. Which equation could be used to find how long it will take to process the income and payroll if both computers are used?

I said 1/7+1/5=1/x am i right?

anonymous · Answer

|dw:1337464180588:dw|  Yes, sometimes people write it this way also.