解比例7.5:2.5=3.75:x

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解比例7.5:2.5=3.75:x解比例7.5:2.5=3.75:x解比例7.5:2.5=3.75:x7.5:2.5=3.75:x7.5x=2.5×3.75x=2.5×3.75/7.5x=3.75/3

解比例7.5:2.5=3.75:x
解比例7.5:2.5=3.75:x

解比例7.5:2.5=3.75:x
7.5:2.5=3.75:x
7.5x=2.5×3.75
x=2.5×3.75/7.5
x=3.75/3
x=1.25

1.25

1.25