Question

identificar 13x-31 y = -326 ; 25x + 37y = 146 entonces el valor x+y es :

Answer 1

13x - 31y = -326    x= -326+31y/13
25x + 37y = 146
25 (-326+31y)/13 +37y = 146
-8150/13 + 775y/13 + 481y/13= 1898/13
1256y = 10048       y= 8

x= -326/13 + 31(8)/13= -326/13 + 248/13 = -78/13 = -6