Question 1204903
elijah and kylie have a combined age of 31. elijah is 4 years older than twice Kylie's age. How old are Elijah and Kylie

Let Kylie's age be x years

 elijah is 4 years older than twice Kylie's age.

Elijah's age will be 2x+4

elijah and kylie have a combined age of 31

x+2x+4 = 31

3x+4=31

3x=27

x=9 
 
Kylie's   age is 9  years

Elijah's age = 2x+4 = 2(9)+4 =  22 years  substitute x=9