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6.4x-4=5x
We move all terms to the left:
6.4x-4-(5x)=0
We add all the numbers together, and all the variables
1.4x-4=0
We move all terms containing x to the left, all other terms to the right
1.4x=4
x=4/1.4
x=2+1/1.1666666666667
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