10-9a=28

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Solution for 10-9a=28 equation: 



10-9a=28

We move all terms to the left:

10-9a-(28)=0

We add all the numbers together, and all the variables

-9a-18=0

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

-9a=18

a=18/-9

a=-2

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