-9(1-2a)=-81

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Solution for -9(1-2a)=-81 equation: 


Simplifying
-9(1 + -2a) = -81
(1 * -9 + -2a * -9) = -81
(-9 + 18a) = -81

Solving
-9 + 18a = -81

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 18a = -81 + 9

Combine like terms: -9 + 9 = 0
0 + 18a = -81 + 9
18a = -81 + 9

Combine like terms: -81 + 9 = -72
18a = -72

Divide each side by '18'.
a = -4

Simplifying
a = -4

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