p-4p=21

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Solution for p-4p=21 equation: 


Simplifying
p + -4p = 21

Combine like terms: p + -4p = -3p
-3p = 21

Solving
-3p = 21

Solving for variable 'p'.

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

Divide each side by '-3'.
p = -7

Simplifying
p = -7

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