-81=-3(-6a-3)

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Solution for -81=-3(-6a-3) equation:


Simplifying
-81 = -3(-6a + -3)

Reorder the terms:
-81 = -3(-3 + -6a)
-81 = (-3 * -3 + -6a * -3)
-81 = (9 + 18a)

Solving
-81 = 9 + 18a

Solving for variable 'a'.

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

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

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

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

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

Combine like terms: 9 + 81 = 90
-18a = 90

Divide each side by '-18'.
a = -5

Simplifying
a = -5

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