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-2.7=2.5x-4.2
We move all terms to the left:
-2.7-(2.5x-4.2)=0
We get rid of parentheses
-2.5x+4.2-2.7=0
We add all the numbers together, and all the variables
-2.5x+1.5=0
We move all terms containing x to the left, all other terms to the right
-2.5x=-1.5
x=-1.5/-2.5
x=1/1.66666666667
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