-1=(1/2)a+9

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Solution for -1=(1/2)a+9 equation: 



-1=(1/2)a+9

We move all terms to the left:

-1-((1/2)a+9)=0



Domain of the equation: 2)a+9)!=0

a!=0/1

a!=0

a∈R



We add all the numbers together, and all the variables

-((+1/2)a+9)-1=0

We multiply all the terms by the denominator


-((+1-1*2)a+9)=0



We calculate terms in parentheses: -((+1-1*2)a+9), so:

(+1-1*2)a+9

We add all the numbers together, and all the variables

(-1)a+9

We multiply parentheses

-1a+9

Back to the equation:

-(-1a+9)



We get rid of parentheses

1a-9=0

We add all the numbers together, and all the variables

a-9=0

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

a=9

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