如果2.5:x=5分之4,x=_________.如果x:5分之4=0.15:2.5,x=________.
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![如果2.5:x=5分之4,x=_________.如果x:5分之4=0.15:2.5,x=________.](/uploads/image/z/1757863-55-3.jpg?t=%E5%A6%82%E6%9E%9C2.5%3Ax%3D5%E5%88%86%E4%B9%8B4%2Cx%3D_________.%E5%A6%82%E6%9E%9Cx%3A5%E5%88%86%E4%B9%8B4%3D0.15%3A2.5%2Cx%3D________.)
如果2.5:x=5分之4,x=_________.如果x:5分之4=0.15:2.5,x=________.
如果2.5:x=5分之4,x=_________.如果x:5分之4=0.15:2.5,x=________.
如果2.5:x=5分之4,x=_________.如果x:5分之4=0.15:2.5,x=________.
1.x=2.5/(4/5)=12.5/4=3.125=25/8
2.x/(4/5)=0.15/2.5
x=0.15*(4/5)/2.5
=0.12/2.5
=6/125
=0.048
2.5:x=4/5
2.5:x=4:5
x=2.5×5/4=25/8
x:4/5=0.15:2.5
5x:4=3:50
5x=4×3/50
5x=6/25
x=6/125