Question

-31=8-6p-7p

Answer 1

$$
-31=8-6p-7p\\
-31-8=8-6p-7p-8\\
-31-8=6p-7p\\
-31-8=p(6-7)\\
-31-8=p(-1)\\
{-31-8\over -1}={p(-1)\over -1}\\
31+8=p\\
p=31+8
$$
That's it!

Answer 2

thank you!

Answer 3

yw

Answer 4

First of all @chyna98 : A Warm Welcome to 'Open Study'. Please Read CoC (compulsory to read by all "Open Study" users) : http://openstudy.com/code-of-conduct