题目内容
求未知数x.
-2x=
x+5×4=95
:x=
:
.
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 5 |
| 1 |
| 10 |
| 1 |
| 8 |
| 1 |
| 4 |
(1)
-2x=
,
-2x+2x=
+2x,
+2x=
,
+2x-
=
-
,
2x=
,
2x÷2=
÷2,
x=
;
(2)
x+5×4=95,
x+20=95,
x+20-20=95-20,
x=75,
x×
=75×
,
x=125;
(3)
:x=
:
,
x=
×
,
x=
,
x×8=
×8,
x=
.
| 3 |
| 4 |
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| 8 |
| 3 |
| 4 |
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| 8 |
| 5 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
| 5 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
2x=
| 1 |
| 8 |
2x÷2=
| 1 |
| 8 |
x=
| 1 |
| 16 |
(2)
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 5 |
| 3 |
| 5 |
| 3 |
x=125;
(3)
| 1 |
| 10 |
| 1 |
| 8 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 10 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 40 |
| 1 |
| 8 |
| 1 |
| 40 |
x=
| 1 |
| 5 |
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