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2.1x+3.8=18.5
We move all terms to the left:
2.1x+3.8-(18.5)=0
We add all the numbers together, and all the variables
2.1x-14.7=0
We move all terms containing x to the left, all other terms to the right
2.1x=14.7
x=14.7/2.1
x=6+1/1
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