0.8:15/4+(5-x):0.75

问题描述:

0.8:15/4+(5-x):0.75
″喵
0.8:15/4+(5-x):0.75

题目应是 0.8:15/4=(5-x):0.75
0.8*3/4=15/4*(5-x)
2.4=75-15x
15x=72.6
x=4.84对对对的,谢谢哦″