5+-6a=a+-21

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Solution for 5+-6a=a+-21 equation: 



5+-6a=a+-21

We move all terms to the left:

5+-6a-(a+-21)=0

We add all the numbers together, and all the variables

-6a-(a-21)+5+=0

We add all the numbers together, and all the variables

-6a-(a-21)=0

We get rid of parentheses

-6a-a+21=0

We add all the numbers together, and all the variables

-7a+21=0

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

-7a=-21

a=-21/-7

a=+3

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