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2.61x+81=6.8121+9x
We move all terms to the left:
2.61x+81-(6.8121+9x)=0
We add all the numbers together, and all the variables
2.61x-(9x+6.8121)+81=0
We get rid of parentheses
2.61x-9x-6.8121+81=0
We add all the numbers together, and all the variables
-6.39x+74.1879=0
We move all terms containing x to the left, all other terms to the right
-6.39x=-74.1879
x=-74.1879/-6.39
x=11+1/1.6393442622951
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