21a-15=8a+1

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Solution for 21a-15=8a+1 equation: 



21a-15=8a+1

We move all terms to the left:

21a-15-(8a+1)=0

We get rid of parentheses

21a-8a-1-15=0

We add all the numbers together, and all the variables

13a-16=0

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

13a=16

a=16/13

a=1+3/13

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