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1.4x-0.64=0.4
We move all terms to the left:
1.4x-0.64-(0.4)=0
We add all the numbers together, and all the variables
1.4x-1.04=0
We move all terms containing x to the left, all other terms to the right
1.4x=1.04
x=1.04/1.4
x=1/1.3461538461538
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