Question

simplify combing like terms p-(p-q)-q-(q-p)​

Answer 1

p-p+q-q-q+p

-q+p

this the answer . I think it will help u

Answer 2

p-(p-q) - q-(q-p)
= p-p+q-q-q+p
= 0+0-q+p
= -q+p