题目内容
求未知数x.
①2x-1.65=7
②
x+
x=
③
=
.
①2x-1.65=7
②
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
③
| 0.25 |
| 1.25 |
| 1.6 |
| x |
①2x-1.65=7,
2x-1.65+1.65=7+1.65,
2x=8.65,
2x÷2=8.65÷2,
x=4.325;
②
x+
x=
,
(
+
)x=
,
x=
,
x×
=
×
,
x=
;
③
=
,
0.25x=1.25×1.6,
0.25x=2,
0.25x÷0.25=2÷0.25,
x=8.
2x-1.65+1.65=7+1.65,
2x=8.65,
2x÷2=8.65÷2,
x=4.325;
②
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
(
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
| 17 |
| 12 |
| 1 |
| 6 |
| 17 |
| 12 |
| 12 |
| 17 |
| 1 |
| 6 |
| 12 |
| 17 |
x=
| 2 |
| 17 |
③
| 0.25 |
| 1.25 |
| 1.6 |
| x |
0.25x=1.25×1.6,
0.25x=2,
0.25x÷0.25=2÷0.25,
x=8.
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