3p+6=21-2p

Solution for 3p+6=21-2p equation:

Simplifying
3p + 6 = 21 + -2p

Reorder the terms:
6 + 3p = 21 + -2p

Solving
6 + 3p = 21 + -2p

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '2p' to each side of the equation.
6 + 3p + 2p = 21 + -2p + 2p

Combine like terms: 3p + 2p = 5p
6 + 5p = 21 + -2p + 2p

Combine like terms: -2p + 2p = 0
6 + 5p = 21 + 0
6 + 5p = 21

Add '-6' to each side of the equation.
6 + -6 + 5p = 21 + -6

Combine like terms: 6 + -6 = 0
0 + 5p = 21 + -6
5p = 21 + -6

Combine like terms: 21 + -6 = 15
5p = 15

Divide each side by '5'.
p = 3

Simplifying
p = 3