exam Maths Puzzle Numerical Ability

Mixed Operations???
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exam Other Question

A total of $3.45 constisting of dimes and quarters was collected from a soft drink vending machine. If there are 3 more dimes than quarters, find the numnber of dimes and quarters. x-2 x+5
___ * ______
x-5 x-2

I need to multiply this can you show me how to solve
Thank you