Question

check wether the pair of equations 5 x - 4 Y + 8 =0 and 7 x + 6 Y - 9 =0 is constant or not verified by graphical representation

Answer 1

YES,5 x - 4 Y + 8 =0 and 7 x + 6 Y - 9 =0 is constant

BECAUSE WE ONLY ONE CASE IS INCONSISTENCE

WHEN A1/A2=B1/B2 NOT EQUAL TO C1/C2

WHEN EQUATION ARE PARREL THEN

THE EQUATION IS INCONSISTENCE

BUT THERE ARE A1/A2 IS NOT EQUAL TO B1/B2

==> 5/7 IS NOT EQUAL TO  4/ 6

SO, ITS HAVE UNIQUE SOLUTION

SO, THAT EQUATION IS INCOSISTENCE

I HOPE ITS HELPFUL