9=0.42(a)-13.91

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Solution for 9=0.42(a)-13.91 equation: 



9=0.42(a)-13.91

We move all terms to the left:

9-(0.42(a)-13.91)=0

We get rid of parentheses

-0.42a+13.91+9=0

We add all the numbers together, and all the variables

-0.42a+22.91=0

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

-0.42a=-22.91

a=-22.91/-0.42

a=54+0.23/0.42

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