4=a-5a+20

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Solution for 4=a-5a+20 equation: 



4=a-5a+20

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

4a-20+4=0

We add all the numbers together, and all the variables

4a-16=0

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

4a=16

a=16/4

a=4

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