30(1-80%)x=2.4
问题描述:
30(1-80%)x=2.4
答
30(1-80%)x=2.4
30(1-0.8)x=2.4
6x=2.4
x=0.4
30(1-80%)x=2.4
30(1-80%)x=2.4
30(1-0.8)x=2.4
6x=2.4
x=0.4