p-(4p-7)=5p-(p+21)

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Solution for p-(4p-7)=5p-(p+21) equation:


Simplifying
p + -1(4p + -7) = 5p + -1(p + 21)

Reorder the terms:
p + -1(-7 + 4p) = 5p + -1(p + 21)
p + (-7 * -1 + 4p * -1) = 5p + -1(p + 21)
p + (7 + -4p) = 5p + -1(p + 21)

Reorder the terms:
7 + p + -4p = 5p + -1(p + 21)

Combine like terms: p + -4p = -3p
7 + -3p = 5p + -1(p + 21)

Reorder the terms:
7 + -3p = 5p + -1(21 + p)
7 + -3p = 5p + (21 * -1 + p * -1)
7 + -3p = 5p + (-21 + -1p)

Reorder the terms:
7 + -3p = -21 + 5p + -1p

Combine like terms: 5p + -1p = 4p
7 + -3p = -21 + 4p

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

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

Combine like terms: 4p + -4p = 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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