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-4x+(-55)=15
We move all terms to the left:
-4x+(-55)-(15)=0
determiningTheFunctionDomain -4x-15+(-55)=0
We add all the numbers together, and all the variables
-4x-70=0
We move all terms containing x to the left, all other terms to the right
-4x=70
x=70/-4
x=-17+1/2
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