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9x+2.3x+2=243
We move all terms to the left:
9x+2.3x+2-(243)=0
We add all the numbers together, and all the variables
11.3x-241=0
We move all terms containing x to the left, all other terms to the right
11.3x=241
x=241/11.3
x=21+2.1764705882353/6.6470588235295
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