Fill in the operation symbols to add, subtract, multiply and divide to make the equation true 5 5 1 5=8 3 8 3=24 It's a continuous equation

Fill in the operation symbols to add, subtract, multiply and divide to make the equation true 5 5 1 5=8 3 8 3=24 It's a continuous equation

5x(5-1/5)=8/(3-8/3)=24

It's 30 kilometers from the school to the museum. First, take a car. Second, walk. The speed of the car is six times that of walking. How far is a from the museum? Does the car return to pick up B at the same time?

Let a ride time be T1, walk time be T2, walk speed V, speed 6V. A ride x6vt1 + vt2 = 306vt1 = xvt1 = x / 6t1 + (x-x / 6) / (V + 6V) = t2t1 + 5t1 / 7 = t2t2 = 12t1 / 76vt1 + V * 12t1 / 7 = 30vt1 = 35 / 9x = 6vt1 = 70 / 3km, 30-70 / 3 = 20 / 3km away from the museum

The seventh and eighth grade students of a certain school visited the County Museum 12 kilometers away from the school. The seventh grade students went out first for 24 minutes. As a result, the two grades arrived at the museum at the same time, twice as fast. What was the speed of the seventh and eighth grade students

Let the speed of grade seven be X,
Then 12 △ 1.2x = 12 △ x-24
Solving the equation, then x = 1 / 12, that is, the speed of Grade 7 is 60 * 1 / 12 = 5km / h, and that of Grade 8 is 6km / h