Question

Genevieve is 3 years older than twice her brother’s age. Genevieve is 21 years old. Write an equation to find her brother’s age.

Write the equation again and now solve to tell me how old her brother is. Please tell me how you know.

Answer 1

her brother is 9

Explanation:

21-3=18 18 divided by 2 = 9

Answer 2

Genevieve's brother is 9 years old

Explanation:

The equation (Genevieve "G", the brother "B")

`G=2B+3`

`21=2B+3`

`21-3=2B`

`18=2B`

`(18)/(2) =B`

`9=B`

Hope this helps