Question

chris and adam have a combined age of 42. chris is 3 less than two times the age of adam. how old are chris and adam?

Answer 1

Adam's age is 15, Chris' age is 27

Explanation:

Let Chris' age be C

Let Adam's age be A

C + A = 42 equ1

C = (2×A) - 3 = 2A - 3 equ2

From equ1,

Making C the subject,

C = 42 - A

Substituting the value of C in equ2,

42 - A = 2A - 3

Collect like terms,

42 + 3 = 2A + A

45 = 3A

A = 15

Therefore, Adam's age is 15

Using equ1,

C + A = 42

C + 15 = 42

C = 42 - 15

C = 27

Therefore, Chris' age is 27