(13a+1)(-3)=-81

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Solution for (13a+1)(-3)=-81 equation:


Simplifying
(13a + 1)(-3) = -81

Reorder the terms:
(1 + 13a)(-3) = -81

Reorder the terms for easier multiplication:
-3(1 + 13a) = -81
(1 * -3 + 13a * -3) = -81
(-3 + -39a) = -81

Solving
-3 + -39a = -81

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + -39a = -81 + 3

Combine like terms: -3 + 3 = 0
0 + -39a = -81 + 3
-39a = -81 + 3

Combine like terms: -81 + 3 = -78
-39a = -78

Divide each side by '-39'.
a = 2

Simplifying
a = 2

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