X⼀(X⼀30+X⼀20)怎么解?求过程~~

2025-06-24 05:53:27
推荐回答(3个)
回答1:

x/30-x/20=-x/60
原式=-60

回答2:

X/(X/30+X/20)
=X/[X(1/30+1/20)]
=1/[(1/30+1/20)]
=1/(2/60+3/60)
=1/(1/12)
=1*12
=12

回答3:

=X/(1/30*X+1/20*X)
=X/(1/12*X)
=X/X/1/12
=12