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3.1x+4.6=2.1x
We move all terms to the left:
3.1x+4.6-(2.1x)=0
We add all the numbers together, and all the variables
3.1x-(+2.1x)+4.6=0
We get rid of parentheses
3.1x-2.1x+4.6=0
We add all the numbers together, and all the variables
x+4.6=0
We move all terms containing x to the left, all other terms to the right
x=-4.6
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