-21=-7(1-8p)+7(3p-2)

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Solution for -21=-7(1-8p)+7(3p-2) equation:


Simplifying
-21 = -7(1 + -8p) + 7(3p + -2)
-21 = (1 * -7 + -8p * -7) + 7(3p + -2)
-21 = (-7 + 56p) + 7(3p + -2)

Reorder the terms:
-21 = -7 + 56p + 7(-2 + 3p)
-21 = -7 + 56p + (-2 * 7 + 3p * 7)
-21 = -7 + 56p + (-14 + 21p)

Reorder the terms:
-21 = -7 + -14 + 56p + 21p

Combine like terms: -7 + -14 = -21
-21 = -21 + 56p + 21p

Combine like terms: 56p + 21p = 77p
-21 = -21 + 77p

Add '21' to each side of the equation.
-21 + 21 = -21 + 21 + 77p

Combine like terms: -21 + 21 = 0
0 = -21 + 21 + 77p

Combine like terms: -21 + 21 = 0
0 = 0 + 77p
0 = 77p

Solving
0 = 77p

Solving for variable 'p'.

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

Add '-77p' to each side of the equation.
0 + -77p = 77p + -77p
Remove the zero:
-77p = 77p + -77p

Combine like terms: 77p + -77p = 0
-77p = 0

Divide each side by '-77'.
p = 0

Simplifying
p = 0

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