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X=17.50-(X+3X)
We move all terms to the left:
X-(17.50-(X+3X))=0
We add all the numbers together, and all the variables
X-(17.50-(+4X))=0
We calculate terms in parentheses: -(17.50-(+4X)), so:We get rid of parentheses
17.50-(+4X)
determiningTheFunctionDomain -(+4X)+17.50
We add all the numbers together, and all the variables
-(+4X)+17.5
We get rid of parentheses
-4X+17.5
Back to the equation:
-(-4X+17.5)
X+4X-17.5=0
We add all the numbers together, and all the variables
5X-17.5=0
We move all terms containing X to the left, all other terms to the right
5X=17.5
X=17.5/5
X=3+2.5/5
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