.(x+0.4)乘6=5.4 1/3:3/20=7/9:π 3又1/5:π=1.8:5/8 知道的来啊.(x+0.4)乘6=5.4_数学解答

.(x+0.4)乘6=5.4 1/3:3/20=7/9:π 3又1/5:π=1.8:5/8 知道的来啊.
(x+0.4)乘6=5.4 .....1/3:3/20=7/9:π .....3又1/5:π=1.8:5/8

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解答

解(x+0.4)乘6=5.4得6x=3 x=1/2