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4x+39=45.4
We move all terms to the left:
4x+39-(45.4)=0
We add all the numbers together, and all the variables
4x-6.4=0
We move all terms containing x to the left, all other terms to the right
4x=6.4
x=6.4/4
x=1+1/1.6666666666667
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