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6.4x-3=21.8
We move all terms to the left:
6.4x-3-(21.8)=0
We add all the numbers together, and all the variables
6.4x-24.8=0
We move all terms containing x to the left, all other terms to the right
6.4x=24.8
x=24.8/6.4
x=3+3.5/4
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