问题
解答题
解方程: (1)5x=75 (2)2x-
|
答案
(1)5x=75,
5x÷5=75÷5,
x=15;
(2)2x-
1 |
3 |
1 |
2 |
2x-
1 |
3 |
1 |
3 |
1 |
2 |
1 |
3 |
2x=
5 |
6 |
2x÷2=
5 |
6 |
x=
5 |
12 |
解方程: (1)5x=75 (2)2x-
|
(1)5x=75,
5x÷5=75÷5,
x=15;
(2)2x-
1 |
3 |
1 |
2 |
2x-
1 |
3 |
1 |
3 |
1 |
2 |
1 |
3 |
2x=
5 |
6 |
2x÷2=
5 |
6 |
x=
5 |
12 |