Question

3a/8+4a/5-(a/2+2a/5)

Answer 1

okay so first let's solve the bracket first,
3a/8+4a/5-{(5a+4a)/10}
= 3a/8+4a/5-9a/10
and now solving them together we get
=(15a+32a-36a)/40
=11a/40
Hope this what you looking for :) :D

Answer 2

3a/8 +4a/5-a/2-2a/5

=3a/8-a/2 +4a/5-2a/5

= (3a-4a)/8 +(4a-2a)/5
= -a/8 +2a/5

=(-5a+16a)/40

=11a/40