Solve the equation - 6p - 21 = 3p - 12

1st combine like terms by moving all of the terms with p to one side, and all of the other terms to the other side.

-6p - 21 = 3p - 12

-21+12=6p+3p

-9=9p

Divide out the coefficient from both sides

-9/9 = 9p/9

The final answer is

-1=p

The soultion Is p = - 1