Question

What is the value of x + y of the following simultaneous equation 3x+4y=9 ; 4x+3y=5 *
2

Answer 1

3x+4y=9 ____equation 1

4x+3y=5 ____equation 2

add both equation we get

7x + 7y = 14

=> 7 (x + y) = 14

=> x + y = 2 (ans.)