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3.8=2.7x-7.8
We move all terms to the left:
3.8-(2.7x-7.8)=0
We get rid of parentheses
-2.7x+7.8+3.8=0
We add all the numbers together, and all the variables
-2.7x+11.6=0
We move all terms containing x to the left, all other terms to the right
-2.7x=-11.6
x=-11.6/-2.7
x=4+0.8/2.7
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