-5(-2+4a)=90

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Solution for -5(-2+4a)=90 equation: 



-5(-2+4a)=90

We move all terms to the left:

-5(-2+4a)-(90)=0

We add all the numbers together, and all the variables

-5(4a-2)-90=0

We multiply parentheses

-20a+10-90=0

We add all the numbers together, and all the variables

-20a-80=0

We move all terms containing a to the left, all other terms to the right

-20a=80

a=80/-20

a=-4

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