问题
解答题
求未知数x
|
答案
(1)
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
x=120;
(2)0.25:
5 |
8 |
4 |
9 |
5 |
8 |
4 |
9 |
5 |
8 |
1 |
9 |
5 |
8 |
5 |
8 |
1 |
9 |
5 |
8 |
x=
8 |
45 |
(3)0.75x+2.25x=21,
3x=21,
3x÷3=21÷3,
x=7.
求未知数x
|
(1)
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
4 |
5 |
x=120;
(2)0.25:
5 |
8 |
4 |
9 |
5 |
8 |
4 |
9 |
5 |
8 |
1 |
9 |
5 |
8 |
5 |
8 |
1 |
9 |
5 |
8 |
x=
8 |
45 |
(3)0.75x+2.25x=21,
3x=21,
3x÷3=21÷3,
x=7.