Question 979466
110a + 112a - 50b + 30b - 67a + 3


Combine like terms that have (a) as their variable part.

110a + 112a - 67a = 155a

Combine like terms that have (b) as their variable part.

-50b + 30b = -20b

Put (+3) together with 155a and -20b. 

Your new simplify polynomials:

155a - 20b + 3