Question 1199812
8x-7y=-6 
7x-8y=-9


{{{system(8x-7y=-6 ,7x-8y=-9)}}}

8*E1 and -7*E2:


------------------
8(8x-7y)=8(-6)
7(7x-8y)=7(-9)
------------------


---------------
64x-56y=-48
49x-56y=-63
---------------


-------------
64x-56y=-48
-49x+56y=63
-------------


ADD


{{{15x=15}}}

{{{x=1}}}



Return to original and do 7*E1 and 8*E2;


------------
56x-49y=-42
56x-64y=-72
------------


(-1)E2


----------------
56x-49y=-42
-56x+64y=72
----------------


ADD

{{{15y=30}}}

{{{y=2}}}



Intersection point,  (1,2).