Question

every evening jenna empties her pockets and puts her change in a jar. At the end of the week she counts her money. One week she had 38 coins, all of them dimes and quarters. When she added them up she had a total of $6.95

let d=number of dimes
q= the number of quarters
how many dimes did jenna have?

Answer 1

6.95=0.10d+0.25q

d+q=38

Answer 2

q=38-d

6.95=0.10d+0.25(38-d)

Answer 3

6.95=0.10d-0.25d+9.5

Answer 4

solve for d then

38-d=q