题目内容
解方程.
5x-3×
=
+
x=
2x-45%=5
.
5x-3×
| 7 |
| 10 |
| 7 |
| 5 |
| 4 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
2x-45%=5
| 11 |
| 20 |
(1)5x-3×
=
,
5x-
=
,
5x-
+
=
+
,
5x=
,
5x÷5=
÷5,
x=
×
,
x=
;
(2)
+
x=
,
+
x-
=
-
,
x=
,
x×2=
×2,
x=
;
(3)2x-45%=5
,
2x-45%+45%=5
+45%,
2x=5.55+0.45,
2x=6,
2x÷2=6÷2,
x=3.
| 7 |
| 10 |
| 7 |
| 5 |
5x-
| 21 |
| 10 |
| 7 |
| 5 |
5x-
| 21 |
| 10 |
| 21 |
| 10 |
| 7 |
| 5 |
| 21 |
| 10 |
5x=
| 35 |
| 10 |
5x÷5=
| 35 |
| 10 |
x=
| 35 |
| 10 |
| 1 |
| 5 |
x=
| 7 |
| 10 |
(2)
| 4 |
| 5 |
| 1 |
| 2 |
| 9 |
| 10 |
| 4 |
| 5 |
| 1 |
| 2 |
| 4 |
| 5 |
| 9 |
| 10 |
| 4 |
| 5 |
| 1 |
| 2 |
| 1 |
| 10 |
| 1 |
| 2 |
| 1 |
| 10 |
x=
| 1 |
| 5 |
(3)2x-45%=5
| 11 |
| 20 |
2x-45%+45%=5
| 11 |
| 20 |
2x=5.55+0.45,
2x=6,
2x÷2=6÷2,
x=3.
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