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10%*/200+x=0.3%怎么算

250ml*0.3%=x*10%250ml*0.3=10xx=25ml*0.3=7.5ml

200*0.3%=200X0.003=2X0.3=0.6

解得:x=200/667

300x0.5%十200x0.8%=3x0.5+3x0.8=1.5+2.4=3.9100x0.3%+60x0.01%=0.3+0.006=0.306

200+200*10%*3=200+200*0.1*3=200+20*3=200+60=260

10%X+X=1.1X=3.3所以X=3

500*0.3%÷10%=1.5÷10%=15

10分之三=0.310分之3(200+X)=0.3(200+X)=0.3x200+0.3X=60+0.3X

加入323.3mL水即可

(χ*0.3%)÷10%=6解:0.003x=6÷0.1 x=0.6÷0.003 x=200

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