Question

4(a-1)+5a+8=

5a-12a+5b+8b=

-3a-3b+4a+4b+

Answer 1

1)

4(a-1)+5a+8=

4a-4+5a+8

=9a+4

2)

 5a-12a+5b+8b

=-7a+13b

 3)

-3a-3b+4a+4b

=a+b