Bill M. answered 09/11/12
Tutor
4.9
(1,110)
Doctor of Education, specializing in Artificial Intelligence.
9p + 7(p + 1) = 17 - 4p
9p + 7p + 7 = 17 - 4p Distribute the 7
16p + 7 = 17 - 4p (add 9p and 7p)
16p + 4p = 17 - 7 (add 4p to both sides and subtract 7 from both sides)
20p = 10
p = 10/20 = 1/2