7-4p=3p-21

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


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

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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