Question 678735: Cody is twice as old as Evan and seven years ago the sum of their age was 10. Find the age of each boy now. Answer by rm29924(97) (Show Source):
You can put this solution on YOUR website! Let X = Evan's current age
Cody is twice as old as Evan so:
Cody's current age = 2X
X-7= Evan's age 7 yrs ago
2x-7= Cody's age 7 yrs ago
the sum of their ages 7 yrs ago was 10
so add them and set them equal to 10
x-7+2x-7=10
combine like terms
3x-14=10
add 14 to both sides
3X=24
divide both sides by 3
X=8
Cody's current age is 2X
2(8)
16
answer: Evan is 8 yrs old and Cody is 16 years old
