81=1-8(5-5p)

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Solution for 81=1-8(5-5p) equation:


Simplifying
81 = 1 + -8(5 + -5p)
81 = 1 + (5 * -8 + -5p * -8)
81 = 1 + (-40 + 40p)

Combine like terms: 1 + -40 = -39
81 = -39 + 40p

Solving
81 = -39 + 40p

Solving for variable 'p'.

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

Add '-40p' to each side of the equation.
81 + -40p = -39 + 40p + -40p

Combine like terms: 40p + -40p = 0
81 + -40p = -39 + 0
81 + -40p = -39

Add '-81' to each side of the equation.
81 + -81 + -40p = -39 + -81

Combine like terms: 81 + -81 = 0
0 + -40p = -39 + -81
-40p = -39 + -81

Combine like terms: -39 + -81 = -120
-40p = -120

Divide each side by '-40'.
p = 3

Simplifying
p = 3

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