题目内容
巧解方程.
10×7-5X=7
:
=X:9.
10×7-5X=7
| 2 |
| 3 |
| 5 |
| 6 |
(1)10×7-5x=7,
70-5x=7,
70-5x+5x=7+5x,
7+5x=70,
7+5x-7=70-7,
5x÷5=63÷5,
x=12.6;
(2)
:
=x:9,
x=
×9,
x×
=6×
,
x=7
.
70-5x=7,
70-5x+5x=7+5x,
7+5x=70,
7+5x-7=70-7,
5x÷5=63÷5,
x=12.6;
(2)
| 2 |
| 3 |
| 5 |
| 6 |
| 5 |
| 6 |
| 2 |
| 3 |
| 5 |
| 6 |
| 6 |
| 5 |
| 6 |
| 5 |
x=7
| 1 |
| 5 |
练习册系列答案
相关题目