Question

Sophie is 3.5 years younger than her brother. She knows that when she is b years old, her brother is b+3.5 years old. Right now, Sophie is 11.5 years old.
How old is Sophie's brother?
Write your answer as a whole number or decimal.

Answer 1

Answer:

The answer is 15

Step-by-step explanation:

Lets say b is the age of Sophie, so B would equal 11.5

11.5 + 3.5 = 15 years old.

Answer 2

Answer:

b = 8

Step-by-step explanation:

b + 3.5 = 11.5

Subtract 11.5 from 3.5 to get her brother's age