Question

Eliminacion por sustitucion
. -13y+11y=-163
. -8x+7y=94

Answer 1

-13x +11 y =-163
-8x + 7y = 94 ------ y =(94+8x)/7

-13x + 11 (94+8x)/7=-163
-91x+ 1034 + 88x= -1141
-3 x= -1141-1034
x= 725

-8x+7y=94
-8(725)+7y =94
-5800+7y=94
y= 842