2/75=0.4/x
问题描述:
2/75=0.4/x
答
1.2/75=0.4/x
x=0.4x75÷1.2
x=30÷1.2
x=25
2/75=0.4/x
1.2/75=0.4/x
x=0.4x75÷1.2
x=30÷1.2
x=25