3-p=21

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Solution for 3-p=21 equation: 


Simplifying
3 + -1p = 21

Solving
3 + -1p = 21

Solving for variable 'p'.

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

Add '-3' to each side of the equation.
3 + -3 + -1p = 21 + -3

Combine like terms: 3 + -3 = 0
0 + -1p = 21 + -3
-1p = 21 + -3

Combine like terms: 21 + -3 = 18
-1p = 18

Divide each side by '-1'.
p = -18

Simplifying
p = -18

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