Question

HELP! 10 points! The average of Amy's, Ben's, and Chris's ages is 6. Four years ago, Chris was the same age as Amy is now. In four years, Ben's age will be 3/5 of Amy's age at that time. How many years old is Chris now?

Answer 1

13 y/o

Explanation:

a + b + c )/3 = 9

c-4 = a c = a+4

b+3 = 2/3 ( a +3) b = 2/3( a+3) - 3 Sub the red in to the top equation

(a + 2/3(a+3)-3 + a+4 )/3 = 9

2 2/3 a +3 = 27

8/3 a = 24

a = 9 then c=a+4 = 13 y/o and b=5

Answer 2

10

Check by going backwards