解方程.12x+23x=56 &nb...

解方程.12x+23x=56 x:25=1.2:75.
2025-06-29 06:29:24
推荐回答(1个)
回答1:

1
2
x+
2
3
x=
5
6

     
7
6
7
6
=
5
6
÷
7
6

           x=
5
7


②x:25=1.2:75
    75x=25×1.2
75x÷75=30÷75
      x=0.4