-5(3a+5)=20

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Solution for -5(3a+5)=20 equation: 



-5(3a+5)=20

We move all terms to the left:

-5(3a+5)-(20)=0

We multiply parentheses

-15a-25-20=0

We add all the numbers together, and all the variables

-15a-45=0

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

-15a=45

a=45/-15

a=-3

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