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-2.8-2.7x=-9.01
We move all terms to the left:
-2.8-2.7x-(-9.01)=0
We add all the numbers together, and all the variables
-2.7x+6.21=0
We move all terms containing x to the left, all other terms to the right
-2.7x=-6.21
x=-6.21/-2.7
x=2+0.81/2.7
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