Question 975553
She has X dimes, X+5 quarters, X+15 nickels.

25(X+5)+10(X)+5(X+15)=600

25X+125+10X+5X+75=600

40X+200=600

40X=400

X=10

She has 10 dimes, 15 quarters, 25 nickels

10 Dimes $1.00
15 Quarters $3.75
25 Nickels $1.25