4.8x+8x=640 x等于多少?
问题描述:
4.8x+8x=640 x等于多少?
答
4.8x+8x=640
12.8x=640
x=640÷12.8
x=50
4.8x+8x=640 x等于多少?
4.8x+8x=640
12.8x=640
x=640÷12.8
x=50