解方程80%x+25%x=42
来源:学生作业学帮网 编辑:学帮网 时间:2024/07/08 01:57:54
解方程80%x+25%x=42
80%x+25%x=42
1.05x=42
x=42÷1.05
=40
80%x+25%x=42
105%x=42
x=42÷1.05
x=40
80%x+25%x=42
105%X=42,
X=40
80%x+25%x=42
0.8x+0.25x=42
1.05x=42
x=42/1.05
x=40
化成小数算就出来了。
105%x=42
x=400