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5.4x=42.12
We move all terms to the left:
5.4x-(42.12)=0
We add all the numbers together, and all the variables
5.4x-42.12=0
We move all terms containing x to the left, all other terms to the right
5.4x=42.12
x=42.12/5.4
x=7+3.2727272727273/4.0909090909091
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