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2.1x=+13+44
We move all terms to the left:
2.1x-(+13+44)=0
We add all the numbers together, and all the variables
2.1x-57=0
We move all terms containing x to the left, all other terms to the right
2.1x=57
x=57/2.1
x=27+0.3/2.1
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