p+21=36-2p

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Solution for p+21=36-2p equation:


Simplifying
p + 21 = 36 + -2p

Reorder the terms:
21 + p = 36 + -2p

Solving
21 + p = 36 + -2p

Solving for variable 'p'.

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

Add '2p' to each side of the equation.
21 + p + 2p = 36 + -2p + 2p

Combine like terms: p + 2p = 3p
21 + 3p = 36 + -2p + 2p

Combine like terms: -2p + 2p = 0
21 + 3p = 36 + 0
21 + 3p = 36

Add '-21' to each side of the equation.
21 + -21 + 3p = 36 + -21

Combine like terms: 21 + -21 = 0
0 + 3p = 36 + -21
3p = 36 + -21

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

Divide each side by '3'.
p = 5

Simplifying
p = 5

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