Verified Answer :

Edmund

\(p-15=13-6p\)

\(-15-13=-6p-p\)

\(-28=-7p\)

\(\frac{-28}{-7}=\frac{-7p}{-7}\)

\(4=p\)



\(4-15=13-6(4)\)

\(-11=-11\)

P-15=13-6p
+6p           +6p
-----------------
7p-15=13
     +15  +15
-----------------
7p=28
7      7
p = 4