0.4*+0.5*=3.6

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0.4*+0.5*=3.60.4*+0.5*=3.60.4*+0.5*=3.6提取公因式(0.4+0.5)X=3.6X=3.6/(0.4+0.5)=40.9*=3.6*=40.9X=3.6,,,,,,

0.4*+0.5*=3.6
0.4*+0.5*=3.6

0.4*+0.5*=3.6
提取公因式
(0.4+0.5)X=3.6
X=3.6/(0.4+0.5)
=4

0.9*=3.6 *=4

0.9X=3.6,,,,,,,X=4