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X+(5.4)=7X
We move all terms to the left:
X+(5.4)-(7X)=0
We add all the numbers together, and all the variables
-6X+5.4=0
We move all terms containing X to the left, all other terms to the right
-6X=-5.4
X=-5.4/-6
X=3.85714285714/4.28571428571
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