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-2.3x-7=-2.1x+2
We move all terms to the left:
-2.3x-7-(-2.1x+2)=0
We get rid of parentheses
-2.3x+2.1x-2-7=0
We add all the numbers together, and all the variables
-0.2x-9=0
We move all terms containing x to the left, all other terms to the right
-0.2x=9
x=9/-0.2
x=-45
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