Question 1063273
Hi there,
Make quarters = x
Make nickels = y
there are 22 quarters and nickels.
x + y = 22........Eq(1)
the total value is 2.50 
25x + 5y = 250.....Eq(2)
..............
x + y = 22.......Eq(1)
25x + 5y = 250...Eq(2)
Multiply Eq(1) by 25
25x + 25y = 550.....Eq(1)
25x + 5y = 250......Eq(2)
Subtract Eq(2) from Eq(1)
......20y = 300
y = 15
Substitute y = 15 into Eq(1)
x + y = 22.......Eq(1)
x + 15 = 22
x = 22 - 15
x = 7
There are 7 quarters and 15 nickels.
Hope this helps :-)