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-2.3-4.2x=-66.3
We move all terms to the left:
-2.3-4.2x-(-66.3)=0
We add all the numbers together, and all the variables
-4.2x+64=0
We move all terms containing x to the left, all other terms to the right
-4.2x=-64
x=-64/-4.2
x=15+1/4.2
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