Question

7m + 8n=13. 9m - 11n=3​

Answer 1

Answer:

solution is 3

Step-by-step explanation:

7m+8n ; 15mn=13

mn=15-13 ;2

mn=9m-11n

m^2-n^2= 11-11

m^2-n^2=0+3

=3

hope it helps you.✌