(21-3a)=6-8

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Solution for (21-3a)=6-8 equation: 



(21-3a)=6-8

We move all terms to the left:

(21-3a)-(6-8)=0

We add all the numbers together, and all the variables

(-3a+21)-(-2)=0

We add all the numbers together, and all the variables

(-3a+21)+2=0

We get rid of parentheses

-3a+21+2=0

We add all the numbers together, and all the variables

-3a+23=0

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

-3a=-23

a=-23/-3

a=7+2/3

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