4p-7=21-3p

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Solution for 4p-7=21-3p equation: 


Simplifying
4p + -7 = 21 + -3p

Reorder the terms:
-7 + 4p = 21 + -3p

Solving
-7 + 4p = 21 + -3p

Solving for variable 'p'.

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

Add '3p' to each side of the equation.
-7 + 4p + 3p = 21 + -3p + 3p

Combine like terms: 4p + 3p = 7p
-7 + 7p = 21 + -3p + 3p

Combine like terms: -3p + 3p = 0
-7 + 7p = 21 + 0
-7 + 7p = 21

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

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

Combine like terms: 21 + 7 = 28
7p = 28

Divide each side by '7'.
p = 4

Simplifying
p = 4

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