Question

Jeff is 2 times older than Bob. Peter is 7 years younger than Bob. Write an expression in

simplest form to represent the sum of their ages.

Answer 1

4x - 7

Explanation:

The x represents Bob's age since, we don't know what it is, I put it as a variable.

2x This represents Jeff who is 2 times Bob's age.

x - 7 Peter is younger than Bob by 7 years so we need to take away 7 from Bob's age

2x + x - 7 + x This would be the expression

4x - 7 Now just combine the like terms. We don't have Bob's age so the expression will stay like this.