3A+8=a-9

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Solution for 3A+8=a-9 equation: 



3+8=A-9

We move all terms to the left:

3+8-(A-9)=0

We add all the numbers together, and all the variables

-(A-9)+11=0

We get rid of parentheses

-A+9+11=0

We add all the numbers together, and all the variables

-1A+20=0

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

-A=-20

A=-20/-1

A=+20

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