7.5x减5.5x等于0.75
问题描述：
7.5x减5.5x等于0.75
答
7.5x-5.5x=0.75
2x=0.75
x=0.375
7.5x减5.5x等于0.75
7.5x-5.5x=0.75
2x=0.75
x=0.375