A-8a+7a+3a=19

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Solution for A-8a+7a+3a=19 equation: 



-8A+7A+3A=19

We move all terms to the left:

-8A+7A+3A-(19)=0

We add all the numbers together, and all the variables

2A-19=0

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

2A=19

A=19/2

A=9+1/2

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