问题
解答题
解方程.
|
答案
(1)2x+4=6,
2x+4-4=6-4,
2x=2,
2x÷2=2÷2,
x=1;
(2)35x+13x=9.6,
48x=9.6,
48x÷48=9.6÷48,
x=0.2;
(3)
3 |
4 |
2 |
5 |
7 |
12 |
7 |
20 |
7 |
12 |
7 |
20 |
7 |
20 |
7 |
12 |
7 |
20 |
x=1
2 |
3 |
(4)
7 |
9 |
1 |
2 |
7 |
9 |
1 |
2 |
7 |
9 |
7 |
9 |
7 |
9 |
x=9.
解方程.
|
(1)2x+4=6,
2x+4-4=6-4,
2x=2,
2x÷2=2÷2,
x=1;
(2)35x+13x=9.6,
48x=9.6,
48x÷48=9.6÷48,
x=0.2;
(3)
3 |
4 |
2 |
5 |
7 |
12 |
7 |
20 |
7 |
12 |
7 |
20 |
7 |
20 |
7 |
12 |
7 |
20 |
x=1
2 |
3 |
(4)
7 |
9 |
1 |
2 |
7 |
9 |
1 |
2 |
7 |
9 |
7 |
9 |
7 |
9 |
x=9.