Subtract :-
4x-9y from the sum of 3x + 4y and 9x-7y pls it's urgent for my sister​

8x + 6y

Explanation:

Given the following algebraic expression;

4x - 9y equation 1

3x + 4y equation 2

9x - 7y equation 3

First of all, we would sum up eqn 2 & 3;

(3x + 4y + 9x - 7y)

Collecting like terms, we have;

3x + 9x + 4y - 7y = 12x - 3y equation 4

Next, we would subtract eqn 1 from eqn 4;

12x - 3y - (4x - 9y) =

12x - 3y - 4x + 9y =

12x - 4x - 3y + 9y =

8x + 6y

c is the correct answer for this question.

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.