exam Maths Puzzle Numerical Ability

HOW DO i SOLVE THIS PROBLEM ? (7XA)x3=7x)2x3)

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exam Other Question

Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 54 pounds of feed worth $.28 per pound by mixing one kind worth $.24 per pound with another worth $.42 per pound. How many pounds of the cheaper kind should they use in the mix? How do you work this problem?