20.5=-15.5+(3.6x)+1.8x

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Solution for 20.5=-15.5+(3.6x)+1.8x equation: 



20.5=-15.5+(3.6x)+1.8x

We move all terms to the left:

20.5-(-15.5+(3.6x)+1.8x)=0

We add all the numbers together, and all the variables

-(-15.5+(+3.6x)+1.8x)+20.5=0



We calculate terms in parentheses: -(-15.5+(+3.6x)+1.8x), so:

-15.5+(+3.6x)+1.8x

determiningTheFunctionDomain
(+3.6x)+1.8x-15.5

We add all the numbers together, and all the variables

1.8x+(+3.6x)-15.5

We get rid of parentheses

1.8x+3.6x-15.5

We add all the numbers together, and all the variables

5.4x-15.5

Back to the equation:

-(5.4x-15.5)



We get rid of parentheses

-5.4x+15.5+20.5=0

We add all the numbers together, and all the variables

-5.4x+36=0

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

-5.4x=-36

x=-36/-5.4

x=6+2.25/3.375

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