0.3X/2.8=4.5
问题描述:
0.3X/2.8=4.5
答
0.3X/2.8=4.5
x=4.5/0.3*2.8
x=15*2.8
x=42
0.3X/2.8=4.5
0.3X/2.8=4.5
x=4.5/0.3*2.8
x=15*2.8
x=42