2p-9=5p-21

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Solution for 2p-9=5p-21 equation:


Simplifying
2p + -9 = 5p + -21

Reorder the terms:
-9 + 2p = 5p + -21

Reorder the terms:
-9 + 2p = -21 + 5p

Solving
-9 + 2p = -21 + 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.
-9 + 2p + -5p = -21 + 5p + -5p

Combine like terms: 2p + -5p = -3p
-9 + -3p = -21 + 5p + -5p

Combine like terms: 5p + -5p = 0
-9 + -3p = -21 + 0
-9 + -3p = -21

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

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

Combine like terms: -21 + 9 = -12
-3p = -12

Divide each side by '-3'.
p = 4

Simplifying
p = 4

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