81=3a-8a-9a

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Solution for 81=3a-8a-9a equation:


Simplifying
81 = 3a + -8a + -9a

Combine like terms: 3a + -8a = -5a
81 = -5a + -9a

Combine like terms: -5a + -9a = -14a
81 = -14a

Solving
81 = -14a

Solving for variable 'a'.

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

Add '14a' to each side of the equation.
81 + 14a = -14a + 14a

Combine like terms: -14a + 14a = 0
81 + 14a = 0

Add '-81' to each side of the equation.
81 + -81 + 14a = 0 + -81

Combine like terms: 81 + -81 = 0
0 + 14a = 0 + -81
14a = 0 + -81

Combine like terms: 0 + -81 = -81
14a = -81

Divide each side by '14'.
a = -5.785714286

Simplifying
a = -5.785714286

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