-5(a-3)=20

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



-5(a-3)=20

We move all terms to the left:

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

We multiply parentheses

-5a+15-20=0

We add all the numbers together, and all the variables

-5a-5=0

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

-5a=5

a=5/-5

a=-1

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