题目内容
| 解方程. 8x-3.6=5.4 | x-
|
|
(1)8x-3.6=5.4,
8x+3.6-3.6=5.4+3.6,
8x=9,
8x÷8=9÷8,
x=1
;
(2)x-
x=21,
x=21,
x×
=21×
,
x=49;
(3)
:
=X:0.8,
X=0.8×
,
x×
=
×
,
x=
,
x=2
.
8x+3.6-3.6=5.4+3.6,
8x=9,
8x÷8=9÷8,
x=1
| 1 |
| 8 |
(2)x-
| 4 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 7 |
| 3 |
| 7 |
| 3 |
x=49;
(3)
| 1 |
| 2 |
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 2 |
| 3 |
| 8 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
x=
| 32 |
| 15 |
x=2
| 2 |
| 15 |
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