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-2.1x-9.1=-2.6x+2.3
We move all terms to the left:
-2.1x-9.1-(-2.6x+2.3)=0
We get rid of parentheses
-2.1x+2.6x-2.3-9.1=0
We add all the numbers together, and all the variables
0.5x-11.4=0
We move all terms containing x to the left, all other terms to the right
0.5x=11.4
x=11.4/0.5
x=22+0.4/0.5
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