-5(1+8a)=-285

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Solution for -5(1+8a)=-285 equation: 


Simplifying
-5(1 + 8a) = -285
(1 * -5 + 8a * -5) = -285
(-5 + -40a) = -285

Solving
-5 + -40a = -285

Solving for variable 'a'.

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

Add '5' to each side of the equation.
-5 + 5 + -40a = -285 + 5

Combine like terms: -5 + 5 = 0
0 + -40a = -285 + 5
-40a = -285 + 5

Combine like terms: -285 + 5 = -280
-40a = -280

Divide each side by '-40'.
a = 7

Simplifying
a = 7

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