题目内容
| 解方程. 0.4(x-0.4)=4 |
|
|
(1)0.4(x-0.4)=4,
0.4(x-0.4)÷0.4=4÷0.4,
x-0.4=10,
x-0.4+0.4=10+0.4,
x=10.4.
(2)
x+
x=25,
x(
+
)=25,
x=25
x÷
=25÷
,
x=30;
(3)
x=
,
x÷
=
÷
,
x=
.
0.4(x-0.4)÷0.4=4÷0.4,
x-0.4=10,
x-0.4+0.4=10+0.4,
x=10.4.
(2)
| 1 |
| 2 |
| 1 |
| 3 |
x(
| 1 |
| 2 |
| 1 |
| 3 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
x=30;
(3)
| 2 |
| 7 |
| 8 |
| 21 |
| 2 |
| 7 |
| 2 |
| 7 |
| 8 |
| 21 |
| 2 |
| 7 |
x=
| 4 |
| 3 |
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