Question

slove using cross multiplication method (2x/3)+(y/2)=-1, (-x/3)+y=3​

Answer 1

Answer:

Answer

Correct option is

D

x=1,y=−1

2x−y=3---(1)

4x+y=3---(2)

Using formula for cross multiplication method:

(b

1

c

2

−b

2

c

1

)

x

=

(c

1

a

2

−a

1

c

2

)

y

=

(a

1

b

2

−a

2

b

1

)

−1

So, from equation (1) and (2) we can write the value of a,b and c.

(−1)×3−1×3)

x

=

(3×4−2×3)

y

=

(2×1−4×(−1))

−1

−3−3

x

=

12−6

y

=

2+4

−1

−6

x

=

6

y

=

6

−1

−6

x

=

6

−1

6x=6

x=1

6

y

=

6

−1

6y=−6

y=−1

Therefore, x=1,y=−1

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