Question

if x=1 and y=-1 is the solution of the equation 2x+ay=-1 and 5x-4y =b then​

Answer 1

Step-by-step explanation:

here,

x=1

y=-1

2×1+a×-1=-1

→-a=-3

→a=3

now,

5×1-4×(-1)=b

→b=9