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-4x+(-7)=20
We move all terms to the left:
-4x+(-7)-(20)=0
determiningTheFunctionDomain -4x-20+(-7)=0
We add all the numbers together, and all the variables
-4x-27=0
We move all terms containing x to the left, all other terms to the right
-4x=27
x=27/-4
x=-6+3/4
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