Factorise this as far as possible 4p+pq-5pr

My math teacher told my class to "steal" a 6th grade fraction word problem from the internet, word problems? : -p requirements: only a 1 step word problem. needs to be complex.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?