Question

1) a+(2b-3c) 2) a-(2b-3c) 3) a+(2b-3c) 4 -(a-2b+3c)

Answer 1

$1) a+(2b-3c)=a+2b-3c\\ 2) a-(2b-3c)=a-2b+3c\\ 3) a+(2b-3c)=a-2b-3c\\ 4)-(a-2b+3c)=-a+2b-3c$

Answer 2

It seems like you've provided four different mathematical expressions. Here they are with some explanations:

1. a + (2b - 3c) This expression represents the addition of 'a' and the result of subtracting '3c' from '2b'. You can simplify it by adding 'a' to the result of '2b - 3c'.

2. a - (2b - 3c) This expression represents the subtraction of the result of '2b - 3c' from 'a'. You can simplify it by subtracting '2b - 3c' from 'a'.

3. a + (2b - 3c) This is the same as expression 1. It represents the addition of 'a' and the result of subtracting '3c' from '2b'.

4. -(a - 2b + 3c) This expression represents negating the result of 'a - 2b + 3c'. You can simplify it by distributing the negative sign inside the parentheses.

If you want specific numerical values for these expressions, you would need to provide values for 'a,' 'b,' and 'c.' If you have any specific calculations or questions related to these expressions, please let me know.