exam Maths Puzzle Numerical Ability

HI,
I am having trouble with an algebra problem. Here it is:
y divided by 4xy. I am not sure what steps to take to figure out the answer. Any advice will be helpful. Thank You f

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exam Other Question

You are on a road trip and make a rest stop after being on the road for 85 miles. You have another 55 miles to go before reaching your destination. What fraction of the road trip h for the input-output matrix A, find the output required to meet the demand D:

A=0.2 0.4
0.3 0.6

D=700
400