-2(5+8a)=-90

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Solution for -2(5+8a)=-90 equation: 


Simplifying
-2(5 + 8a) = -90
(5 * -2 + 8a * -2) = -90
(-10 + -16a) = -90

Solving
-10 + -16a = -90

Solving for variable 'a'.

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

Add '10' to each side of the equation.
-10 + 10 + -16a = -90 + 10

Combine like terms: -10 + 10 = 0
0 + -16a = -90 + 10
-16a = -90 + 10

Combine like terms: -90 + 10 = -80
-16a = -80

Divide each side by '-16'.
a = 5

Simplifying
a = 5

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