解方程(或比例)5X-3.2=6.8 12:X=18:

解方程(或比例)5X-3.2=6.8 12:X=18:13.
2025-04-28 17:32:47
推荐回答(1个)
回答1:

(1)5x-3.2=6.8,
     5x-3.2+3.2=6.8+3.2,
             5x=10,
          5x÷5=10÷5,
              x=2;

(2)12:x=

1
8
1
3

      
1
8
x=4,
   
1
8
x×8=4×8,
         x=32.