Question

Simplify : p + (p – q) + q + (q – p)

1. p
2. q
3. p + q
4. p – q

Answer 1

Answer:

p + q

Step-by-step explanation:

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

= p+q + {(p-q)+(q-p)}

= p+q+ {p-q+q-p}

=p+q