题目内容
求未知数x.
(1)
x-
×4=
(2)4:
=x:
(3)3x-
=
(4)6×1.5+5x=12.
(1)
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
(2)4:
| 3 |
| 5 |
| 5 |
| 8 |
(3)3x-
| 2 |
| 5 |
| 3 |
| 5 |
(4)6×1.5+5x=12.
(1)
x-
×4=
,
x-
+
=
+
,
x÷
=
÷
,
x=3;
(2)4:
=x:
,
x=4×
,
x÷
=
÷
,
x=4
;
(3)3x-
=
,
3x-
+
=
+
,
3x÷3=1÷3,
x=
;
(4)6×1.5+5x=12,
9+5x-9=12-9,
5x÷5=3÷5,
x=0.6.
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 4 |
| 3 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
| 9 |
| 4 |
| 3 |
| 4 |
x=3;
(2)4:
| 3 |
| 5 |
| 5 |
| 8 |
| 3 |
| 5 |
| 5 |
| 8 |
| 3 |
| 5 |
| 3 |
| 5 |
| 5 |
| 2 |
| 3 |
| 5 |
x=4
| 1 |
| 6 |
(3)3x-
| 2 |
| 5 |
| 3 |
| 5 |
3x-
| 2 |
| 5 |
| 2 |
| 5 |
| 3 |
| 5 |
| 2 |
| 5 |
3x÷3=1÷3,
x=
| 1 |
| 3 |
(4)6×1.5+5x=12,
9+5x-9=12-9,
5x÷5=3÷5,
x=0.6.
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