21=5(p+9)

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Solution for 21=5(p+9) equation:


Simplifying
21 = 5(p + 9)

Reorder the terms:
21 = 5(9 + p)
21 = (9 * 5 + p * 5)
21 = (45 + 5p)

Solving
21 = 45 + 5p

Solving for variable 'p'.

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

Add '-5p' to each side of the equation.
21 + -5p = 45 + 5p + -5p

Combine like terms: 5p + -5p = 0
21 + -5p = 45 + 0
21 + -5p = 45

Add '-21' to each side of the equation.
21 + -21 + -5p = 45 + -21

Combine like terms: 21 + -21 = 0
0 + -5p = 45 + -21
-5p = 45 + -21

Combine like terms: 45 + -21 = 24
-5p = 24

Divide each side by '-5'.
p = -4.8

Simplifying
p = -4.8

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