-21=3(p+3)

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Solution for -21=3(p+3) equation:


Simplifying
-21 = 3(p + 3)

Reorder the terms:
-21 = 3(3 + p)
-21 = (3 * 3 + p * 3)
-21 = (9 + 3p)

Solving
-21 = 9 + 3p

Solving for variable 'p'.

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

Add '-3p' to each side of the equation.
-21 + -3p = 9 + 3p + -3p

Combine like terms: 3p + -3p = 0
-21 + -3p = 9 + 0
-21 + -3p = 9

Add '21' to each side of the equation.
-21 + 21 + -3p = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -3p = 9 + 21
-3p = 9 + 21

Combine like terms: 9 + 21 = 30
-3p = 30

Divide each side by '-3'.
p = -10

Simplifying
p = -10

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