(0.1x-0.3)/0.03-(2x+1)/0.2=1.2快

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(0.1x-0.3)/0.03-(2x+1)/0.2=1.2快
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(0.1x-0.3)/0.03-(2x+1)/0.2=1.2快
(0.1x-0.3)/0.03-(2x+1)/0.2=1.2

(0.1x-0.3)/0.03-(2x+1)/0.2=1.2快
(0.1x-0.3)/0.03-(2x+1)/0.2=1.2
(10x-30)/3-5(2x+1)=1.2
10x-30-30x-15=1.2*3
20x=-48.6
x=-2.43