Answer:
Terry has 20 quarters and 18 dimes
Step-by-step explanation:
Let
x -----> the number of quarters
y ----> the number of dimes
Remember that
1 quarter=$0.25
1 dime=$0.10
we know that
x=y+2 ----> equation A
0.25x+0.10y=6.80 -----> equation B
Substitute equation A in equation B and solve for y
0.25(y+2)+0.10y=6.80
0.25y+0.50+0.10y=6.80
0.25y+0.10y=6.80-0.50
0.35y=6.30
y=18 dimes
Find the value of x
x=y+2 -----> x=18+2=20 quarters
therefore
Terry has 20 quarters and 18 dimes
