T= 1/6 hours, that is, 10 minutes.

2. These three numbers are XYZ, x+y+z = 10, x = 2z, y = 3z+ 1.

X=2，Y=7，Z= 1。

That is, the three digits are 27 1.

3. If the height is x, there is 5 * 3 * 60+2 (5x+3x) * 60 * 2/3 =1860, and the solution is x =1.5m..

4. If the height is x, there is ((6+3)X+3*6)*3=2 16, and the solution is X=6.

5. For every X yuan, 2*3.2+35X=23.9, and X=0.5 yuan.

6.X is in 5 yuan, Y is in 2 yuan, X+Y = 39, 5x+2Y =11,X =1,Y=28.

7,3x+8 = 4x-6, X= 14 yuan.

8. Only buy 1 basketball, there are x students, there are 10X-2=9X+6, the solution X=8, basketball 78 yuan.

9. These four days are 26th, 27th, 28th and 29th, and Lao Li will travel abroad on the 30th.

10, v dad =2/3, caught up at t, that's right.

V dad *(5+T)=V sub *T, and the solution is T= 10 minutes.

1 1, part x, specifying time t; 8t-2 = (t-11) *12, solving T=32.5 hours, totaling 258.

12 consists of a wall, the length of which is x, with (X- 1)+2*(X-5)= 10, which means that X=7 is 7 meters long and 2 meters wide.