a+11=21a-8

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Solution for a+11=21a-8 equation: 



a+11=21a-8

We move all terms to the left:

a+11-(21a-8)=0

We get rid of parentheses

a-21a+8+11=0

We add all the numbers together, and all the variables

-20a+19=0

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

-20a=-19

a=-19/-20

a=19/20

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