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56/8+4*9-2x=57
We move all terms to the left:
56/8+4*9-2x-(57)=0
determiningTheFunctionDomain -2x-57+56/8+4*9=0
We add all the numbers together, and all the variables
-2x-14=0
We move all terms containing x to the left, all other terms to the right
-2x=14
x=14/-2
x=-7
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