解方程或解比例: (1)42-6Χ=15.6 (2)Χ:0.2=23:0.8.

解方程或解比例: (1)42-6Χ=15.6 (2)Χ:0.2=23:0.8.
2025-04-08 17:30:33
推荐回答(1个)
回答1:

(1)42-6Χ=15.6,
      42-6Χ+6x=15.6+6x,
       42-15.6=15.6+6x-15.6,
          26.4=6x,
       26.4÷6=6x÷6,
             x=4.4;

(2)Χ:0.2=

2
3
:0.8,
          0.8x=0.2×
2
3

     0.8x÷0.8=
2
15
÷
0.8,
             x=
1
6