180=42+x+(138-x)

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Solution for 180=42+x+(138-x) equation: 



180=42+x+(138-x)

We move all terms to the left:

180-(42+x+(138-x))=0

We add all the numbers together, and all the variables

-(42+x+(-1x+138))+180=0



We calculate terms in parentheses: -(42+x+(-1x+138)), so:

42+x+(-1x+138)

determiningTheFunctionDomain
x+(-1x+138)+42

We get rid of parentheses

x-1x+138+42

We add all the numbers together, and all the variables

180

Back to the equation:

-(180)



We add all the numbers together, and all the variables

=0

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