300=300-x+(300-x)

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Solution for 300=300-x+(300-x) equation: 



300=300-x+(300-x)

We move all terms to the left:

300-(300-x+(300-x))=0

We add all the numbers together, and all the variables

-(300-x+(-1x+300))+300=0



We calculate terms in parentheses: -(300-x+(-1x+300)), so:

300-x+(-1x+300)

determiningTheFunctionDomain
-x+(-1x+300)+300

We add all the numbers together, and all the variables

-1x+(-1x+300)+300

We get rid of parentheses

-1x-1x+300+300

We add all the numbers together, and all the variables

-2x+600

Back to the equation:

-(-2x+600)



We get rid of parentheses

2x-600+300=0

We add all the numbers together, and all the variables

2x-300=0

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

2x=300

x=300/2

x=150

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