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12.8x=-124.26
We move all terms to the left:
12.8x-(-124.26)=0
We add all the numbers together, and all the variables
12.8x+124.26=0
We move all terms containing x to the left, all other terms to the right
12.8x=-124.26
x=-124.26/12.8
x=-9+2.9607843137255/4.1830065359477
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