Question 238216
There is a typo here.

What do you mean a coin contains 60 coins?


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I got your reply.

When solving coin problems set up a table having number, value and total.

dimes = x

value of a dime = 10 cents

total = 10x

quarters = 60 - x

value of a quarter = 25 cents

total = 25(60 - x)


Our equation is:

10x + 25(60 - x) = 1140

NOTICE: I deleted all decimals by converting each into a whole number.

It's easier working with whole numbers than with decimals.

10x + 1500 - 25x = 1140

-15x = -1500 + 1140

-15x = -360

x = -360/-15

x = 24

Number of quarters = 60 - 24 or 36

Understand?