15-2p=p-21

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Solution for 15-2p=p-21 equation:


Simplifying
15 + -2p = p + -21

Reorder the terms:
15 + -2p = -21 + p

Solving
15 + -2p = -21 + p

Solving for variable 'p'.

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

Add '-1p' to each side of the equation.
15 + -2p + -1p = -21 + p + -1p

Combine like terms: -2p + -1p = -3p
15 + -3p = -21 + p + -1p

Combine like terms: p + -1p = 0
15 + -3p = -21 + 0
15 + -3p = -21

Add '-15' to each side of the equation.
15 + -15 + -3p = -21 + -15

Combine like terms: 15 + -15 = 0
0 + -3p = -21 + -15
-3p = -21 + -15

Combine like terms: -21 + -15 = -36
-3p = -36

Divide each side by '-3'.
p = 12

Simplifying
p = 12

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