Question 660245
Starting with 
4 + 5(p+6) = 20 + 7p
Distribute the 5
4 + 5p +30 = 20 + 7p
Combine like terms
5p + 34 = 20 + 7p
5p - 5p + 34 - 20 = 20 - 20 + 7p - 5p
14 = 2p
14/2 = 2p/2
7=p