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2.1x=7.75
We move all terms to the left:
2.1x-(7.75)=0
We add all the numbers together, and all the variables
2.1x-7.75=0
We move all terms containing x to the left, all other terms to the right
2.1x=7.75
x=7.75/2.1
x=3+1/1.448275862069
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