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x=6.4x-9
We move all terms to the left:
x-(6.4x-9)=0
We get rid of parentheses
x-6.4x+9=0
We add all the numbers together, and all the variables
-5.4x+9=0
We move all terms containing x to the left, all other terms to the right
-5.4x=-9
x=-9/-5.4
x=1+2.25/3.375
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