Question

Joe has $6.40 in nickels and quarters. He has two more nickels than quarters. How many quarters does Joe have?

Answer 1

Quarters = 12

And correspondingly, amount of Nickels:

Nickels = 48

Answer 2

Quaters - Q=12

Dimes - D=10

Nickels - N= 48

Explanation:

First, notice that $6.40 = 640 cents. The corresponding linear equation and a solution is shown below in several steps:

Original equation for amount of Dimes (D):

10*D + 25*(D+2) +5*4*(D+2) = 640

Simplified as following, resulting in the answer for D:

55*D=550

D=10

thus having the amount of Quarters:

Q=12

and correspondingly, amount of Nickels:

N= 48