28=-9a+1

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Solution for 28=-9a+1 equation: 



28=-9a+1

We move all terms to the left:

28-(-9a+1)=0

We get rid of parentheses

9a-1+28=0

We add all the numbers together, and all the variables

9a+27=0

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

9a=-27

a=-27/9

a=-3

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