Question

Amy and Sarah are twins. They have a younger brother who is 3 years younger.

Frankie was asked to write an expression for the total of their ages.
He said ‘ x + x + x + 3 = 3x + 3

Do you agree with his answer? Give a reason why.

Answer 1

Answer: no, because you are subtracting the 3 rather than adding

Explanation:

twins= x + x

brother= x-3

equation =2x + (x-3)