3、解方程 X-1/4X=2/3 X÷3/5=3/4 1/5X=25%

问题描述:

3、解方程 X-1/4X=2/3 X÷3/5=3/4 1/5X=25%

X-(1/4)X=2/3
(3/4)x=2/3
x=8/9
X÷3/5=3/4
x=3/4×3/5
x=9/20
(1/5)X=25%
(1/5)X=1/4
X=5/4

3/4X=2/3
X=8/9
3/5X=3/4
X=9/20
1/5X=1/4
X=5/4

X-1/4X=2/3
3x/4=2/3
x=8/9
X÷3/5=3/4
x=3/4×3/5
x=9/20
1/5X=25%
x=1.25