81=-5(1-8a)+3a

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Solution for 81=-5(1-8a)+3a equation:


Simplifying
81 = -5(1 + -8a) + 3a
81 = (1 * -5 + -8a * -5) + 3a
81 = (-5 + 40a) + 3a

Combine like terms: 40a + 3a = 43a
81 = -5 + 43a

Solving
81 = -5 + 43a

Solving for variable 'a'.

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

Add '-43a' to each side of the equation.
81 + -43a = -5 + 43a + -43a

Combine like terms: 43a + -43a = 0
81 + -43a = -5 + 0
81 + -43a = -5

Add '-81' to each side of the equation.
81 + -81 + -43a = -5 + -81

Combine like terms: 81 + -81 = 0
0 + -43a = -5 + -81
-43a = -5 + -81

Combine like terms: -5 + -81 = -86
-43a = -86

Divide each side by '-43'.
a = 2

Simplifying
a = 2

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