21-p=15

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Solution for 21-p=15 equation: 


Simplifying
21 + -1p = 15

Solving
21 + -1p = 15

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 + -1p = 15 + -21

Combine like terms: 21 + -21 = 0
0 + -1p = 15 + -21
-1p = 15 + -21

Combine like terms: 15 + -21 = -6
-1p = -6

Divide each side by '-1'.
p = 6

Simplifying
p = 6

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