Question

4x +8
To be correct, the students could have written any of the following expressions EXCEPT –
1. 12x
2. 4(x + 2)
3. 3x + 8 + x
4. 2 + 2x + 2x +6

Answer 1

(1.)
Would be the correct answer because you can't add the two values together, they both need to have 'x' to be able to.