3p-21=4p-13

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Solution for 3p-21=4p-13 equation:


Simplifying
3p + -21 = 4p + -13

Reorder the terms:
-21 + 3p = 4p + -13

Reorder the terms:
-21 + 3p = -13 + 4p

Solving
-21 + 3p = -13 + 4p

Solving for variable 'p'.

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

Add '-4p' to each side of the equation.
-21 + 3p + -4p = -13 + 4p + -4p

Combine like terms: 3p + -4p = -1p
-21 + -1p = -13 + 4p + -4p

Combine like terms: 4p + -4p = 0
-21 + -1p = -13 + 0
-21 + -1p = -13

Add '21' to each side of the equation.
-21 + 21 + -1p = -13 + 21

Combine like terms: -21 + 21 = 0
0 + -1p = -13 + 21
-1p = -13 + 21

Combine like terms: -13 + 21 = 8
-1p = 8

Divide each side by '-1'.
p = -8

Simplifying
p = -8

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