f one pump can inflate an air mattress in 21 minutes and a second pump can inflate the same mattress in 42 minutes, find the am
1 answer:
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There are many ways to solve this. I think the easiest way for this one is to add the equations up.
The you solve that, now that y is gone. You get x=2.
Now plug in x into one of the original equations.
Finish solving, and you get y=8.
The answer is (2,8)
The you solve that, now that y is gone. You get x=2.
Now plug in x into one of the original equations.
Finish solving, and you get y=8.
The answer is (2,8)