S:= 'Счет: '+10; t:= '2.1' + 3; s= t=

In the code snippets you've provided, you appear to be trying to concatenate a string with a number in a programming language that does not support implicit conversion between strings and numbers.

Let's break down the two assignments:

1. S:= 'Счет: '+10;

   • If you are trying to concatenate the string 'Счет: ' with the number 10, you will need to convert 10 to a string first (the method to do this depends on the programming language you are using, e.g., in Python, you would do something like S = 'Счет: ' + str(10)).
   • In many languages, doing S = 'Счет: ' + 10 will result in an error.

2. t:= '2.1' + 3;

   • Similar to the first example, you are trying to add a string '2.1' to a number 3. This operation will also typically result in an error unless you convert 3 to a string first (e.g., t = '2.1' + str(3)).
   • The addition of string and number types is usually not allowed directly and needs explicit conversion.

To summarize:

• For S: Convert 10 to string before concatenation.
• For t: Convert 3 to string before concatenation.

If you provide the programming language you're using, I can give you more specific guidance!