-3p+21=12

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Solution for -3p+21=12 equation: 


Simplifying
-3p + 21 = 12

Reorder the terms:
21 + -3p = 12

Solving
21 + -3p = 12

Solving for variable 'p'.

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

Add '-21' to each side of the equation.
21 + -21 + -3p = 12 + -21

Combine like terms: 21 + -21 = 0
0 + -3p = 12 + -21
-3p = 12 + -21

Combine like terms: 12 + -21 = -9
-3p = -9

Divide each side by '-3'.
p = 3

Simplifying
p = 3

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