3p-6=p+21

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

Simplifying
3p + -6 = p + 21

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

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

Solving
-6 + 3p = 21 + p

Solving for variable 'p'.

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

Add '-1p' to each side of the equation.
-6 + 3p + -1p = 21 + p + -1p

Combine like terms: 3p + -1p = 2p
-6 + 2p = 21 + p + -1p

Combine like terms: p + -1p = 0
-6 + 2p = 21 + 0
-6 + 2p = 21

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

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

Combine like terms: 21 + 6 = 27
2p = 27

Divide each side by '2'.
p = 13.5

Simplifying
p = 13.5