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-4(x+7)=21-(x-12)
We move all terms to the left:
-4(x+7)-(21-(x-12))=0
We multiply parentheses
-4x-(21-(x-12))-28=0
We calculate terms in parentheses: -(21-(x-12)), so:We get rid of parentheses
21-(x-12)
determiningTheFunctionDomain -(x-12)+21
We get rid of parentheses
-x+12+21
We add all the numbers together, and all the variables
-1x+33
Back to the equation:
-(-1x+33)
-4x+1x-33-28=0
We add all the numbers together, and all the variables
-3x-61=0
We move all terms containing x to the left, all other terms to the right
-3x=61
x=61/-3
x=-20+1/3
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