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47=-1+4(8-2x)
We move all terms to the left:
47-(-1+4(8-2x))=0
We add all the numbers together, and all the variables
-(-1+4(-2x+8))+47=0
We calculate terms in parentheses: -(-1+4(-2x+8)), so:We get rid of parentheses
-1+4(-2x+8)
determiningTheFunctionDomain 4(-2x+8)-1
We multiply parentheses
-8x+32-1
We add all the numbers together, and all the variables
-8x+31
Back to the equation:
-(-8x+31)
8x-31+47=0
We add all the numbers together, and all the variables
8x+16=0
We move all terms containing x to the left, all other terms to the right
8x=-16
x=-16/8
x=-2
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