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-40x+18+-20x+3+-15+9=180
We move all terms to the left:
-40x+18+-20x+3+-15+9-(180)=0
determiningTheFunctionDomain -40x-20x+18+3-15+9-180++=0
We add all the numbers together, and all the variables
-60x=0
x=0/-60
x=0
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