A-6a+7a-8=20

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Solution for A-6a+7a-8=20 equation: 



-6A+7A-8=20

We move all terms to the left:

-6A+7A-8-(20)=0

We add all the numbers together, and all the variables

A-28=0

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

A=28

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