Question

Consider a pair of equations
5/x+2+7y+2=31/12
4/x+2+3/y+2=17/12

What is the value of x and y?
(a) x = 2 and y = 4
(b) x = 3 and y = 4
(c) x = 4 and y = 2
(d) x = 4 and y = 3

Answer 1

Answer:

7x−4y=49...(i) and

5x−6y=57...(ii)

Here

a

1

Step-by-step explanation:

7x−4y=49...(i) and

5x−6y=57...(ii)

Here

a

1

=7,b

1

=−4,c

1

=49 and

a

2

=5,b

2

=−6,c

2

=57

So,

a

2

a

1

=

5

7

,

b

2

b

1

=

−6

−4

=

3

2

Since,

a

2

a

1



=

b

2

b

1