Question

Add: 7 pq+5 qr-3 rp ; 4qr+9rp-4rp

Answer 1

Step-by-step explanation:

$7pq + 5qr - 3rp + 4qr + 9rp - 4rp \\ \\ 7pq + 9qr + 2rp$

Answer 2

Answer:

7 pq + 9 rq + 2 rp

Step-by-step explanation:

7 pq + 5 qr + 4 qr -3rp -4rp +9rp =

7pq + 9 rq + 9rp - (3rp + 4rp ) =

7pq + 9 rq + 9 rp - 7 rp =

7 pq + 9 rq + 2rp