Question

If 5x+4y=23 and 4x+5y=22, then what is the value of (x + y)

Answer 1

Step-by-step explanation:

add equation 1 and 2

5x+4y=23

4x+5y=22

_______

9x+9y=45

9(x+y)=45

x+y = 45/9

x+y = 5

is the solution of equation