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3.3x-8.5=x+8.7
We move all terms to the left:
3.3x-8.5-(x+8.7)=0
We get rid of parentheses
3.3x-x-8.7-8.5=0
We add all the numbers together, and all the variables
2.3x-17.2=0
We move all terms containing x to the left, all other terms to the right
2.3x=17.2
x=17.2/2.3
x=7+1/2.0909090909091
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