Question

linear equation in two variable problem set = 1 question (3) 4 3x-y-2=0 ; 2x+y=8 ssc board​

Answer 1

Answer:

ANSWER:

Disclaimer: There is error in the Q. In (II) there should have been 2x - 3y = 12

5x + 3y = 9 -----(I)

2x - 3y = 12 ----- (II)

Add (I) and (II)

7x = 21

x = 3

Putting the value of x = 3 in (I) we get

5(3)+3y=9⇒15+3y=9⇒3y=9-15=-6⇒y=-2

Thus, (x, y) = (3, -6).

Answer 2

5x+3y=9-> equation -1

2x-3y=12-> equation -2

Adding equations of 1 and 2

5x+3y=9

2x-3y= 12

____________

7x=21

_____________

So 7x=21

then, x=3

Putting x=3 we substitute in equation -1

5(3)+3y=9

15+3y=9

3y= -6

y= -6/3

y=-2

Then, value of (x, y) = (3,-2)