3p-21=2p-1

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Solution for 3p-21=2p-1 equation:


Simplifying
3p + -21 = 2p + -1

Reorder the terms:
-21 + 3p = 2p + -1

Reorder the terms:
-21 + 3p = -1 + 2p

Solving
-21 + 3p = -1 + 2p

Solving for variable 'p'.

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

Add '-2p' to each side of the equation.
-21 + 3p + -2p = -1 + 2p + -2p

Combine like terms: 3p + -2p = 1p
-21 + 1p = -1 + 2p + -2p

Combine like terms: 2p + -2p = 0
-21 + 1p = -1 + 0
-21 + 1p = -1

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

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

Combine like terms: -1 + 21 = 20
1p = 20

Divide each side by '1'.
p = 20

Simplifying
p = 20

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