5(-6-4a)=-90

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Solution for 5(-6-4a)=-90 equation: 



5(-6-4a)=-90

We move all terms to the left:

5(-6-4a)-(-90)=0

We add all the numbers together, and all the variables

5(-4a-6)-(-90)=0

We add all the numbers together, and all the variables

5(-4a-6)+90=0

We multiply parentheses

-20a-30+90=0

We add all the numbers together, and all the variables

-20a+60=0

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

-20a=-60

a=-60/-20

a=+3

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