Question

Simplify :
p - (p - q)- q - (q - p)

Answer 1

p-(p-q)-q-(q-p)

=( p-p)+(q-q)-q+p

= p-q

Answer 2

Hey
p - (p - q)- q - (q - p)

p -p+q-q-q+p
2p-p-q
=p-q

Hope it helps to you.