Question

How do you solve `3p - 9+ 2p = 21`?

Answer 1

`p=6`

Explanation:

`3p - 9color(red)(+9)+ 2p = 21color(red)(+9)" "larr` add 9 to both sides to get rid of -9

`5p = 30" "larr div 5` to isolate p

`p = 6`