题目内容
| 解方程. x+
| x+
| ||||||||
|
| ||||||||
| 0.48x+12=48. |
(1)x+
=
,
x+
-
=
-
,
x=
;
(2)x+
=
,
x+
-
=
-
,
x=
;
(3)
-x=
,
-x+x=
+x,
+x=
,
+x-
=
-
,
x=
;
(4)
+x=
,
+x-
=
-
,
x=
;
(5)
-x=
,
-x+x=
+x,
+x=
,
+x-
=
-
,
x=
;
(6)0.48x+12=48,
0.48x+12-12=48-12,
0.48x=36,
0.48x÷0.48=36÷0.48,
x=75.
| 5 |
| 9 |
| 17 |
| 18 |
x+
| 5 |
| 9 |
| 5 |
| 9 |
| 17 |
| 18 |
| 5 |
| 9 |
x=
| 7 |
| 18 |
(2)x+
| 5 |
| 6 |
| 11 |
| 12 |
x+
| 5 |
| 6 |
| 5 |
| 6 |
| 11 |
| 12 |
| 5 |
| 6 |
x=
| 1 |
| 12 |
(3)
| 6 |
| 7 |
| 1 |
| 6 |
| 6 |
| 7 |
| 1 |
| 6 |
| 1 |
| 6 |
| 6 |
| 7 |
| 1 |
| 6 |
| 1 |
| 6 |
| 6 |
| 7 |
| 1 |
| 6 |
x=
| 29 |
| 42 |
(4)
| 2 |
| 3 |
| 7 |
| 9 |
| 2 |
| 3 |
| 2 |
| 3 |
| 7 |
| 9 |
| 2 |
| 3 |
x=
| 1 |
| 9 |
(5)
| 7 |
| 8 |
| 3 |
| 4 |
| 7 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
| 7 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
| 7 |
| 8 |
| 3 |
| 4 |
x=
| 1 |
| 8 |
(6)0.48x+12=48,
0.48x+12-12=48-12,
0.48x=36,
0.48x÷0.48=36÷0.48,
x=75.
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