exam Maths Puzzle Numerical Ability

Evaluate x over y if x is 49 and y= -7

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exam Other Question

I have a question on a story problem...
Mary has a total of $4.75 in her bank. There are 39 coins in all: some are dimes are some are quarters. How many coins of each are there in her bank?
please
d+q=39
10d+25q=475 Solve the following systems by addition. If a unique soution does not exist, state whether the system is inconsistent or dependent.

x + 5y = 10
-2 - 10y = -20