A(12)=50-1.25a

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Solution for A(12)=50-1.25a equation: 



(12)=50-1.25A

We move all terms to the left:

(12)-(50-1.25A)=0

We add all the numbers together, and all the variables

-(-1.25A+50)+12=0

We get rid of parentheses

1.25A-50+12=0

We add all the numbers together, and all the variables

1.25A-38=0

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

1.25A=38

A=38/1.25

A=30+0.5/1.25

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