4(a+20)=20

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Solution for 4(a+20)=20 equation: 



4(a+20)=20

We move all terms to the left:

4(a+20)-(20)=0

We multiply parentheses

4a+80-20=0

We add all the numbers together, and all the variables

4a+60=0

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

4a=-60

a=-60/4

a=-15

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