(3a-21)=14-4a

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Solution for (3a-21)=14-4a equation: 



(3a-21)=14-4a

We move all terms to the left:

(3a-21)-(14-4a)=0

We add all the numbers together, and all the variables

(3a-21)-(-4a+14)=0

We get rid of parentheses

3a+4a-21-14=0

We add all the numbers together, and all the variables

7a-35=0

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

7a=35

a=35/7

a=5

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