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2x+x+0.5=9.8
We move all terms to the left:
2x+x+0.5-(9.8)=0
We add all the numbers together, and all the variables
3x-9.3=0
We move all terms containing x to the left, all other terms to the right
3x=9.3
x=9.3/3
x=3+0.3/3
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