1⼀x 2:1⼀3=2⼀7:4⼀7这道题怎么做?

2024-12-02 04:14:35
推荐回答(1个)
回答1:

1/(X+2):1/3=3/(X+2),

2/7:4/7=1/2,

化简得:

3/(X+2)=1/2,

内项的积等于外项的积:

X+2=3×2,

X=4。