Question

Expand using distributive property 7(3a-2b) and 5(3b-4a) and add the two results together,and simplify

Answer 1

a + b

Explanation:

7(3a-2b) = 21a - 14b

5(3b-4a) = 15b - 20a

(21a - 14b) + (15b - 20a)

21a - 20a - 14b + 15b

a + b

Answer 2

a+b

Explanation:

7(3a-2b) + 5(3b-4a)

Distribute

21a -14b + 15b -20a

Combine like terms

21a -20a -14b+15b

a +b