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0.2x2 0.2x等于五

0.2*2+0.2X=5 解:0.4+0.2X=50.2X=5-0.40.2X=4.6 X=4.6÷0.2 X=23

解:0.4+0.2X=5 0.2x=50.4 X=4.6÷0.2 X=23

0.2x2+0.2x=50.2X=5-0.40.2X=4.6X=23

X=24

0.2*2+0.2x=5 解 0.4+0.2x=5 0.4+x=5÷0.2 0.4+x=25 0.4x=25 x=25÷0.4 x=62.5

0.2X2+0.2X=5解 :0.4+0.2X=50.2X=5-0.40.2X=4.6X=23

0.2*2+0.2X=50.4+0.2X=50.2X=5-0.40.2X=4.6X=4.6÷0.2X=23

0.5X4=0.4X50.5X6=0.6X50.8X4=0.4X80.5X8=0.8X5

0.35X20一0.2x=57-0.2X=50.2X=7-50.2X=2X=10

(1) 3-0.4x-2=0.2x0.6x=1x=5/3(2) 5/2y-20+y=6-1/3y-37/2y-20=3-1/3y23/6y=23y=6(3) 2*[4x+2+1]+1=-28x+6+1=-28x=-9x=-9/8

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