题目内容
求未知数X
2X+2.7=24.7
X-
X=
42:
=X:
.
2X+2.7=24.7
X-
| 2 |
| 3 |
| 1 |
| 3 |
42:
| 1 |
| 3 |
| 5 |
| 7 |
(1)2X+2.7=24.7,
2x+2.7-2.7=24.7-2.7,
2x÷2=22÷2,
x=11;
(2)x-
x=
,
x=
,
x×3=
×3,
x=1;
(3)42:
=x:
,
x=42×
,
x×3=30×3,
x=90.
2x+2.7-2.7=24.7-2.7,
2x÷2=22÷2,
x=11;
(2)x-
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=1;
(3)42:
| 1 |
| 3 |
| 5 |
| 7 |
| 1 |
| 3 |
| 5 |
| 7 |
| 1 |
| 3 |
x=90.
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