book Maths Puzzle Numerical Ability

a vending machine takes only nickels and dimes. there are 5 times as many dimes as nickels in the machine. the face value of the coins is $4.40. how many of each coin are in the machine?

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book Other Question
what is the soultion to this simultaneous equation using substion or addtion method?
2x+3y=-5
3x-y=20 find two cosecutive odd integers whose sum is 72