Adding (14ab – 8b – 20a) to (20ab + 14b + 12a) will give
(14ab – 8b – 20a) + (20ab + 14b + 12a)
Step1:
Open the brackets.
= 14ab – 8b – 20a + 20ab + 14b + 12a
Step2:
Rearrange the like terms.
= (12a - 20a) + (14b - 8b) + (14ab + 20ab)
Step3:
Add the like terms.
= - 8a + 6b + 34ab