Julia is five years older than her sister Babs, and their ages add up to 31. How old is Babs?

Question

algebra 2

Answer 1

Let Babs be X years old then Julia is X+5.

 

Now you can add the 2 ages and the sum is 31 and you solve for X

 

X + X + 5 = 31

 

2X + 5 = 31

 

2X = 26

 

X = 13

 

Always go back and check your work, Babs is 13, and Julia is 5 years older so she is 18, and 18 & 13 add to 31.

 

All the best

 

Lori

Answer 2

Julia's age=x+5

Babs' age=x

x+x+5=31

2x+5=31

2x=31-5

2x=26

x=26/2

x=13 years old (Babs' age)