-7(1-8a)=-399

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Solution for -7(1-8a)=-399 equation: 


Simplifying
-7(1 + -8a) = -399
(1 * -7 + -8a * -7) = -399
(-7 + 56a) = -399

Solving
-7 + 56a = -399

Solving for variable 'a'.

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

Add '7' to each side of the equation.
-7 + 7 + 56a = -399 + 7

Combine like terms: -7 + 7 = 0
0 + 56a = -399 + 7
56a = -399 + 7

Combine like terms: -399 + 7 = -392
56a = -392

Divide each side by '56'.
a = -7

Simplifying
a = -7

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