x-15%x=42.5
问题描述：
x-15%x=42.5
答
x-15%x=42.5
0.85x=42.5
x=42.5÷0.85
x=50
x-15%x=42.5
x-15%x=42.5
0.85x=42.5
x=42.5÷0.85
x=50