Question

Which expressions are equivalent to this expression?

y+y+y+3z

Select each correct answer.

A. 2y + 2z + y + z

B. 3 + y + 3z

C. 3(y + z)

D. 3y + z

Answer 1

The answer is C. 3(y + z)

Proof:
y + y + y + 3z
Add same terms:
3y + 3z
Factor out 3:
3(y + z)