81=105-(5.00+x+7.50)

Solution for 81=105-(5.00+x+7.50) equation:

81=105-(5.00+x+7.50)

We move all terms to the left:

81-(105-(5.00+x+7.50))=0

We add all the numbers together, and all the variables

-(105-(x+12.5))+81=0


We calculate terms in parentheses: -(105-(x+12.5)), so:

105-(x+12.5)

determiningTheFunctionDomain
-(x+12.5)+105

We get rid of parentheses

-x-12.5+105

We add all the numbers together, and all the variables

-1x+92.5

Back to the equation:

-(-1x+92.5)


We get rid of parentheses

1x-92.5+81=0

We add all the numbers together, and all the variables

x-11.5=0

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

x=11.5