题目内容
| 1.4:x=14:10 | x:(3+x)=3:4 |
|
|
(1)1.4:x=14:10,
14x=1.4×10,
14x÷14=14÷14,
x=1;
(2)x:(3+x)=3:4,
4x=3×(3+x),
4x=9+3x,
4x-3x=9+3x-3x,
x=9;
(3)
x+
=
,
x+
-
=
-
,
x×
=
×
,
x=
;
(4)
=
,
8×(x+1)=5×(x+3),
8x+8=5x+15,
8x+8-5x=5x+15-5x,
3x+8-8=15-8,
3x÷3=7÷3,
x=
.
14x=1.4×10,
14x÷14=14÷14,
x=1;
(2)x:(3+x)=3:4,
4x=3×(3+x),
4x=9+3x,
4x-3x=9+3x-3x,
x=9;
(3)
| 5 |
| 6 |
| 1 |
| 3 |
| 7 |
| 20 |
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 3 |
| 7 |
| 20 |
| 1 |
| 3 |
| 5 |
| 6 |
| 6 |
| 5 |
| 1 |
| 60 |
| 6 |
| 5 |
x=
| 1 |
| 50 |
(4)
| x+1 |
| x+3 |
| 5 |
| 8 |
8×(x+1)=5×(x+3),
8x+8=5x+15,
8x+8-5x=5x+15-5x,
3x+8-8=15-8,
3x÷3=7÷3,
x=
| 7 |
| 3 |
练习册系列答案
相关题目