Question

Simplify : [ 6 - 4a + 3b – ( 2a – b ) ] – ( 4a – 7b + 8 )

Answer 1

=[6-4a+3b-(2a-b)]-(4a-7b+8)
=[6-4a-2a+3b+b]-(4a-7b+8)
=[6-6a+4b]-(4a-7b+8)
=6-6a+4b-4a+7b-8
=(-2)-10a+11b

Answer 2

6-8-6a-4a+7b+4b=-2-10a+11b