题目内容
求未知数x
X-大6×2=大十2
5:x=大十:6
=
大.2X+2.6=6.2.
X-大6×2=大十2
5:x=大十:6
| 2 |
| 着 |
| X |
| 9 |
大.2X+2.6=6.2.
(1)k-16×2=102
k-42=102
k-42+42=102+42
k=144;
(2)5:k=10:6
10k=5×6
10k=40
10k÷10=40÷10
k=4;
(4)
=
4k=2×9
4k=18
4k÷4=18÷4
k=6;
(4)1.2k+4.6=6.4
1.2k+4.6-4.6=6.4-4.6
1.2k=1.8
1.2k÷1.2=1.8÷1.2
k=1.5.
k-42=102
k-42+42=102+42
k=144;
(2)5:k=10:6
10k=5×6
10k=40
10k÷10=40÷10
k=4;
(4)
| 2 |
| 4 |
| k |
| 9 |
4k=2×9
4k=18
4k÷4=18÷4
k=6;
(4)1.2k+4.6=6.4
1.2k+4.6-4.6=6.4-4.6
1.2k=1.8
1.2k÷1.2=1.8÷1.2
k=1.5.
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