Section: Math

41) If 2a+3b=26 and 5a+4b=51, what is the value of a+b? 

1. 8
2. 9
3. 10
4. 11

STEP ONE. Add the two equations (7a+7b=77).
STEP TWO. Divide by 7 (a+b=11). Answer 4 is the correct choice.