解方程:2.5X=7.5:12 &n...

解方程:2.5X=7.5:12 50%×5-34X=0.6.
2025-12-15 04:47:53
推荐回答(1个)
回答1:

(1)

2.5
x
=7.5:12,
         7.5x=2.5×12,
         7.5x=30,
    7.5x÷7.5=30÷7.5,
            x=4;

(2)50%×5-
3
4
x=0.6,
        2.5-
3
4
x=0.6,
        0.6+
3
4
x=2.5,
    0.6+
3
4
x-0.6=2.5-0.6,
           
3
4
x=
19
10

       
3
4
3
4
=
19
10
÷
3
4

              x=2
8
15