Cody is twice as old as Evan and seven years ago the sum of their age was 7. find the age of each boy now

Cody: 2x

Evan: x

x-7 (Evan’s age 7 years ago (-7))

2x-7 (Cody’s age 7 years ago (-7))

So you add both

x-7+2x-7

And that should equal 7 (seven years ago the sum of their age was 7)

x-7+2x-7=7

3x-14=7

3x=21

x=7

Evan (x) = 7

Cody (2x) = 7 times 2

Cody = 14