x-0.25x =5.7
问题描述：
x-0.25x =5.7
答
x - 0.25x = 5.7
0.75x = 5.7
x = 7.6
x-0.25x =5.7
x - 0.25x = 5.7
0.75x = 5.7
x = 7.6