Question

A : For x-2y= 0 and 3x+4y=20, x=4 and y=2 is a solution. R : x=4 and y=2 satisfies both the above equations. *
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Answer 1

Answer:

Correct option is

A

One solution

Solution:- (A) one solution

For the given pair of equations x−2y=0 and 3x+4y=20;

a

2

a

1

=

3

1

c

2

b

1

=

4

−2

=

2

−1

c

2

c

1

=

−20

0

=0

As the given pair of linear equation satisfies

a

2

a

1



=

b

2

b

1

,

The graph will be a pair of lines intersecting at a unique point, which is the solution of the pair of equations.