if p and q are integers such that p+q =9, then what is the value of

Question

q - 9 / 4p

Answer 1

if p+q =9, then q = 9-p

and

(q - 9)/(4p) <==== I assumed you meant this, even though it was not typed that way

= (9-p - 9)/(4p)
= -p/(4p)
= -1/4

Answer 2

in solving the algebraic equation
2(x - 5) = 2x + 10, you end up with -10 = 10. What does this mean?