题目内容
求未知数x的值
(1)7
-1.5x=6
(2)
x-
x=8
(3)x:
=5:
(4)
(x+
)=
.
(1)7
| 1 |
| 2 |
(2)
| 1 |
| 3 |
| 1 |
| 4 |
(3)x:
| 7 |
| 9 |
| 7 |
| 4 |
(4)
| 1 |
| 5 |
| 5 |
| 2 |
| 9 |
| 10 |
(1)7
-1.5x=6,
1.5x=7
-6,
1.5x=1.5,
1.5x÷1.5=1.5÷1.5,
x=1;
(2)
x-
x=8,
x=8,
x÷
=8÷
,
x=96;
(3)x:
=5:
x=
×5,
x÷
=
×5÷
,
x=
×5×
,
x=
;
(4)
(x+
)=
,
(x+
)÷
=
÷
,
x+
=
,
x+
-
=
-
,
x=2.
| 1 |
| 2 |
1.5x=7
| 1 |
| 2 |
1.5x=1.5,
1.5x÷1.5=1.5÷1.5,
x=1;
(2)
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
x=96;
(3)x:
| 7 |
| 9 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
| 9 |
| 7 |
| 4 |
| 7 |
| 4 |
| 7 |
| 9 |
| 7 |
| 4 |
x=
| 7 |
| 9 |
| 4 |
| 7 |
x=
| 20 |
| 9 |
(4)
| 1 |
| 5 |
| 5 |
| 2 |
| 9 |
| 10 |
| 1 |
| 5 |
| 5 |
| 2 |
| 1 |
| 5 |
| 9 |
| 10 |
| 1 |
| 5 |
x+
| 5 |
| 2 |
| 9 |
| 2 |
x+
| 5 |
| 2 |
| 5 |
| 2 |
| 9 |
| 2 |
| 5 |
| 2 |
x=2.
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