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-100=12x+4
We move all terms to the left:
-100-(12x+4)=0
We get rid of parentheses
-12x-4-100=0
We add all the numbers together, and all the variables
-12x-104=0
We move all terms containing x to the left, all other terms to the right
-12x=104
x=104/-12
x=-8+2/3
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