21-p=7(3+2p)

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Solution for 21-p=7(3+2p) equation:


Simplifying
21 + -1p = 7(3 + 2p)
21 + -1p = (3 * 7 + 2p * 7)
21 + -1p = (21 + 14p)

Add '-21' to each side of the equation.
21 + -21 + -1p = 21 + -21 + 14p

Combine like terms: 21 + -21 = 0
0 + -1p = 21 + -21 + 14p
-1p = 21 + -21 + 14p

Combine like terms: 21 + -21 = 0
-1p = 0 + 14p
-1p = 14p

Solving
-1p = 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.
-1p + -14p = 14p + -14p

Combine like terms: -1p + -14p = -15p
-15p = 14p + -14p

Combine like terms: 14p + -14p = 0
-15p = 0

Divide each side by '-15'.
p = 0

Simplifying
p = 0

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