8a-4=5a+21

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Solution for 8a-4=5a+21 equation: 



8a-4=5a+21

We move all terms to the left:

8a-4-(5a+21)=0

We get rid of parentheses

8a-5a-21-4=0

We add all the numbers together, and all the variables

3a-25=0

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

3a=25

a=25/3

a=8+1/3

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