解方程X-1/5X=24 X-1/8X=42 X-1/9X=64_数学解答

解方程X-1/5X=24 X-1/8X=42 X-1/9X=64

人气：189 ℃　时间：2020-04-14 13:26:26

解答

X-1/5X=24
4/5x=24
x=24÷4/5
x30
X-1/8X=42
7/8x=42
x=42÷7/8
x=48
X-1/9X=64
8/9x=64
x=64÷8/9
x=72