Alex has $20, and ellen has $12. alex is saving $3 per day, and ellen is saveing $5 per day. after how many days will alex and ellen have the same amount of money?

X - the number of days;

20 + 3 x = 12 + 5 x

20 - 12 = 5 x - 3 x

8 = 2 x

x = 8 : 2

x = 4

Answer: After 4 days they will have the same amount of money.

Alex : 20 + 4*3 = 20 + 12 = $32

Ellen: 12 + 4 * 5 = 12 + 20 = $32