0.9/(X+0.4)=0.45

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0.9/(X+0.4)=0.450.9/(X+0.4)=0.450.9/(X+0.4)=0.45(X+0.4)=0.9/0.45x+0.4=2x=1.6x=.1你好0.9/(X+0.4)=0.450.

0.9/(X+0.4)=0.45
0.9/(X+0.4)=0.45

0.9/(X+0.4)=0.45
(X+0.4)=0.9/0.45
x+0.4=2
x=1.6

x=.1

你好
0.9/(X+0.4)=0.45
0.9=0.45(x+0.4)
0.9=0.45x+0.45×0.4
0.9=0.45x+0.18
0.45x=0.9-0.18
x≈1.38
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