1.

1. ax+by =a-b bx-ay=a+b

Answer»

Abx+b²y=ab-b²...(1)
abx-a²y=a²+ab...(2)
(1)-(2)
abx+b²y-abx+a²y=ab-b²-a²-ab
(b²+a²)y=-(b²+a²)
y=-(b²+a²)/(b²+a²)=-1
Put y=-1 in (1)
ax-b=a-b
ax=a-b+b
x=a/a=1


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