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4x+3.4=9.1
We move all terms to the left:
4x+3.4-(9.1)=0
We add all the numbers together, and all the variables
4x-5.7=0
We move all terms containing x to the left, all other terms to the right
4x=5.7
x=5.7/4
x=1+1/2.3529411764706
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