-21-7p=5p+3(3p+7)

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Solution for -21-7p=5p+3(3p+7) equation:


Simplifying
-21 + -7p = 5p + 3(3p + 7)

Reorder the terms:
-21 + -7p = 5p + 3(7 + 3p)
-21 + -7p = 5p + (7 * 3 + 3p * 3)
-21 + -7p = 5p + (21 + 9p)

Reorder the terms:
-21 + -7p = 21 + 5p + 9p

Combine like terms: 5p + 9p = 14p
-21 + -7p = 21 + 14p

Solving
-21 + -7p = 21 + 14p

Solving for variable 'p'.

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

Add '-14p' to each side of the equation.
-21 + -7p + -14p = 21 + 14p + -14p

Combine like terms: -7p + -14p = -21p
-21 + -21p = 21 + 14p + -14p

Combine like terms: 14p + -14p = 0
-21 + -21p = 21 + 0
-21 + -21p = 21

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

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

Combine like terms: 21 + 21 = 42
-21p = 42

Divide each side by '-21'.
p = -2

Simplifying
p = -2

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