x |
5 |
51?x |
12 |
51?x |
4 |
x |
12 |
x |
5 |
51 |
12 |
x |
12 |
51 |
4 |
x |
4 |
x |
12 |
17 |
60 |
51 |
6 |
x=30,
30 |
5 |
51?30 |
12 |
7 |
4 |
3 |
4 |
早晨6點(diǎn)動(dòng)身,下午1點(diǎn)45分到達(dá).
答:下午1點(diǎn)45分能同時(shí)到達(dá)城里.
x |
5 |
51?x |
12 |
51?x |
4 |
x |
12 |
x |
5 |
51 |
12 |
x |
12 |
51 |
4 |
x |
4 |
x |
12 |
17 |
60 |
51 |
6 |
30 |
5 |
51?30 |
12 |
7 |
4 |
3 |
4 |