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4.1x-7.2=21.5
We move all terms to the left:
4.1x-7.2-(21.5)=0
We add all the numbers together, and all the variables
4.1x-28.7=0
We move all terms containing x to the left, all other terms to the right
4.1x=28.7
x=28.7/4.1
x=7+3.5527136788005E-15/4.1
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