-a/2=9

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Solution for -a/2=9 equation: 



-a/2=9

We move all terms to the left:

-a/2-(9)=0

We multiply all the terms by the denominator


-a-9*2=0

We add all the numbers together, and all the variables

-1a-18=0

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

-a=18

a=18/-1

a=-18

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