18=9-a/2

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Solution for 18=9-a/2 equation: 



18=9-a/2

We move all terms to the left:

18-(9-a/2)=0

We add all the numbers together, and all the variables

-(-a/2+9)+18=0

We get rid of parentheses

a/2-9+18=0

We multiply all the terms by the denominator


a-9*2+18*2=0

We add all the numbers together, and all the variables

a+18=0

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

a=-18

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