Question

2,3m+(4,3-7,1)-(9,2n+4,5)-(2,3-1,3n)-5,7

Answer 1

$2,3m+(4,3-7,1)-(9,2n+4,5)-(2,3-1,3n)-5,7=$
$=23m+(43-71)-(92n+45)-(23-13n)-57=$
$=23m-28-92n-45-23+13n-57=$
$=23m-153-79n$

Answer 2

To simplify the expression, let's break it down step by step:

1. Start with the terms inside the parentheses:

   4.3 - 7.1 = -2.8 9.2n + 4.5 2.3 - 1.3n

2. Now, substitute these values back into the original expression:

   2.3m + (-2.8) - (9.2n + 4.5) - (2.3 - 1.3n) - 5.7

3. Next, combine like terms:

   2.3m - 2.8 - 9.2n - 4.5 - 2.3 + 1.3n - 5.7

4. Group the like terms:

   (2.3m - 2.8 - 4.5 - 2.3 - 5.7) + (-9.2n + 1.3n)

5. Perform the arithmetic operations within each group:

   (-11.0) + (-7.9n)

6. Combine the two results:

   -11.0 - 7.9n

So, the simplified expression is:

-11.0 - 7.9n