Question

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

Answer 1

The soultion Is      p = -1

Answer 2

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