P-21=-4

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Solution for P-21=-4 equation: 


Simplifying
P + -21 = -4

Reorder the terms:
-21 + P = -4

Solving
-21 + P = -4

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 + P = -4 + 21

Combine like terms: -21 + 21 = 0
0 + P = -4 + 21
P = -4 + 21

Combine like terms: -4 + 21 = 17
P = 17

Simplifying
P = 17

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