Question

(ii) 2x + y = 5; 3x-y = 5​

Answer 1

Answer:

2x+y=5____(1)

3x-y=5______(2)

________

5x=10

x=2

from equation 1

2x+y=5

4+y=5

y=1

Answer 2

Answer:

2x + y = 5 .....(I)

3x − y = 5 .....(II)

Adding (I) and (II)

5x=10⇒x=105=2

Putting this value in (I) we have

2×2+y=5

⇒4+y=5

⇒y=1(x,y)=(2,1)

(iii) 3x− 5y =16 .....(I)

x − 3y = 8 .....(II)

Multiply (II) with 3

3x−9y=24 .....(III)

(I) − (III)

4y=−8y=−2

Putting the value of y in (II)

x= 2