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4x+(-12)=56
We move all terms to the left:
4x+(-12)-(56)=0
determiningTheFunctionDomain 4x-56+(-12)=0
We add all the numbers together, and all the variables
4x-68=0
We move all terms containing x to the left, all other terms to the right
4x=68
x=68/4
x=17
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