Question

Is the answer 40? I am kind of confused

Answer 1

30

Explanation:

If A+B is 18, A and B should equal 9.

A+B+C=29, that should mean C=6.

A+B+2C=9+9+2(6)

9+9+2(6)=30

Answer 2

Yes

Explanation:

29-18=11

c=11

18+2(11)=40