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2.2+0.3x=0.4
We move all terms to the left:
2.2+0.3x-(0.4)=0
We add all the numbers together, and all the variables
0.3x+1.8=0
We move all terms containing x to the left, all other terms to the right
0.3x=-1.8
x=-1.8/0.3
x=-6+2.2204460492503E-16/0.3
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