Question

Which expression is equal to 3x? (1 point)

x + 3
x + x + x
x + x2
2x + 1

Answer 1

x + x + x

Explanation:

x + 3 can't be combined as they are two different terms

x + x + x = 3x (works)

x + x² can't be combined as they have different exponents

2x + 1 can't be combined as they are two different terms