quarters ---- x
dimes ------ 21-x
25x + 10(21-x) = 375
25x + 210 - 10x = 375
15x = 165
x = 11
Tristan has 11 quarters and 10 dimes
Tristan has $3.75 in quarters and dimes. She has 21 coins. How many of each coin does she have?
2 answers
Where did you get the 15 and 25 from?
2 answers