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x-(.12x)=43200
We move all terms to the left:
x-(.12x)-(43200)=0
We add all the numbers together, and all the variables
x-(+.12x)-43200=0
We get rid of parentheses
x-.12x-43200=0
We add all the numbers together, and all the variables
0.88x-43200=0
We move all terms containing x to the left, all other terms to the right
0.88x=43200
x=43200/0.88
x=49090+0.80000000000291/0.88
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