Question

5 21 _ * _ = 7 25 1 2* _ *0,8= 12 1 7 1 2*_ *_ *2 * _ = 4 9 4

Answer 1

Эм, а что сделать надо?

Answer 2

It seems like you've provided a sequence of mathematical equations with some missing values represented by underscores. To solve for the missing values, let's analyze each equation step by step:

1. 5 * 21 = 105
2. _ * _ = 7 25: There's not enough information to determine the values in this equation.
3. 1 2 * _ * 0.8 = 12: Dividing both sides by 0.8, we get 12.0 / 0.8 = 15, so the missing value is 15.
4. 1 7 1 2 * _ * _ * 2 * _ = 4 9 4: This equation doesn't provide enough information to determine the values.

In summary:

1. 5 * 21 = 105
2. _ * _ = 7 25: Insufficient information.
3. 12 * 15 * 0.8 = 12: The missing value is 15.
4. 1 7 1 2 * _ * _ * 2 * _ = 4 9 4: Insufficient information.

If you have more context or additional information, please provide it so that I can assist you further.