题目内容
解方程.
0.8x-14.7=1.3
x-
+
=1
:x=
:
.
0.8x-14.7=1.3
x-
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 3 |
(1)0.8x-14.7=1.3,
0.8x-14.7+14.7=1.3+14.7,
0.8x÷0.8=16÷0.8,
x=20;
(2)x-
+
=1,
x-
=1,
x-
+
=1+
,
x=1
;
(3)
:x=
:
,
x=
×
,
x×
=
×
,
x=
.
0.8x-14.7+14.7=1.3+14.7,
0.8x÷0.8=16÷0.8,
x=20;
(2)x-
| 1 |
| 4 |
| 1 |
| 5 |
x-
| 1 |
| 20 |
x-
| 1 |
| 20 |
| 1 |
| 20 |
| 1 |
| 20 |
x=1
| 1 |
| 20 |
(3)
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 5 |
| 5 |
| 3 |
| 1 |
| 6 |
| 5 |
| 3 |
x=
| 5 |
| 18 |
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