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2*3+4x=42
We move all terms to the left:
2*3+4x-(42)=0
determiningTheFunctionDomain 4x-42+2*3=0
We add all the numbers together, and all the variables
4x-36=0
We move all terms containing x to the left, all other terms to the right
4x=36
x=36/4
x=9
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