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6.7x+2.2x=93.45
We move all terms to the left:
6.7x+2.2x-(93.45)=0
We add all the numbers together, and all the variables
8.9x-93.45=0
We move all terms containing x to the left, all other terms to the right
8.9x=93.45
x=93.45/8.9
x=10+1/2
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