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6.2x+0.3x=0.9
We move all terms to the left:
6.2x+0.3x-(0.9)=0
We add all the numbers together, and all the variables
6.5x-0.9=0
We move all terms containing x to the left, all other terms to the right
6.5x=0.9
x=0.9/6.5
x=0.9/6.5
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