7p-21=-7+9p

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Solution for 7p-21=-7+9p equation:


Simplifying
7p + -21 = -7 + 9p

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

Solving
-21 + 7p = -7 + 9p

Solving for variable 'p'.

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

Add '-9p' to each side of the equation.
-21 + 7p + -9p = -7 + 9p + -9p

Combine like terms: 7p + -9p = -2p
-21 + -2p = -7 + 9p + -9p

Combine like terms: 9p + -9p = 0
-21 + -2p = -7 + 0
-21 + -2p = -7

Add '21' to each side of the equation.
-21 + 21 + -2p = -7 + 21

Combine like terms: -21 + 21 = 0
0 + -2p = -7 + 21
-2p = -7 + 21

Combine like terms: -7 + 21 = 14
-2p = 14

Divide each side by '-2'.
p = -7

Simplifying
p = -7

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