2(5+5a)=90

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


Simplifying
2(5 + 5a) = 90
(5 * 2 + 5a * 2) = 90
(10 + 10a) = 90

Solving
10 + 10a = 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 + 10a = 90 + -10

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

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

Divide each side by '10'.
a = 8

Simplifying
a = 8

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