题目内容
| 解方程. (1)2x-8.125=18.125 | (2)3x+
| (3)x+
| ||||||||||||||||
(4)2x-
| (5)x-(
| (6)x-(
|
(1)2x-8.125=18.125,
2x-8.125+8.125=18.125+8.125,
2x÷2=26.25÷2,
x=13.125;
(2)3x+
=
,
3x+
-
=
-
,
3x÷3=
÷3,
x=
;
(3)x+
=1,
x+
-
=1-
,
x=
;
(4)2x-
=
,
2x-
+
=
+
,
2x÷2=
÷2,
x=
;
(5)x-(
+
)=
,
x-
=
,
x-
+
=
+
,
x=1
;
(6)x-(
-
)=
,
x-
=
,
x-
+
=
+
,
x=2
.
2x-8.125+8.125=18.125+8.125,
2x÷2=26.25÷2,
x=13.125;
(2)3x+
| 13 |
| 9 |
| 14 |
| 9 |
3x+
| 13 |
| 9 |
| 13 |
| 9 |
| 14 |
| 9 |
| 13 |
| 9 |
3x÷3=
| 1 |
| 9 |
x=
| 1 |
| 27 |
(3)x+
| 5 |
| 9 |
x+
| 5 |
| 9 |
| 5 |
| 9 |
| 5 |
| 9 |
x=
| 4 |
| 9 |
(4)2x-
| 5 |
| 6 |
| 5 |
| 6 |
2x-
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
| 5 |
| 6 |
2x÷2=
| 10 |
| 6 |
x=
| 5 |
| 6 |
(5)x-(
| 3 |
| 14 |
| 4 |
| 7 |
| 1 |
| 2 |
x-
| 11 |
| 14 |
| 1 |
| 2 |
x-
| 11 |
| 14 |
| 11 |
| 14 |
| 1 |
| 2 |
| 11 |
| 14 |
x=1
| 2 |
| 7 |
(6)x-(
| 7 |
| 4 |
| 3 |
| 8 |
| 7 |
| 8 |
x-
| 11 |
| 8 |
| 7 |
| 8 |
x-
| 11 |
| 8 |
| 11 |
| 8 |
| 7 |
| 8 |
| 11 |
| 8 |
x=2
| 1 |
| 4 |
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