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2.7x-1.1x=6.4
We move all terms to the left:
2.7x-1.1x-(6.4)=0
We add all the numbers together, and all the variables
1.6x-6.4=0
We move all terms containing x to the left, all other terms to the right
1.6x=6.4
x=6.4/1.6
x=4
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