Question

Solve
2x-3y = 9; 2x + y = 13​

Answer 1

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2x - 3y = 9..................(i)

2x + y = 13..................(ii)

Subtracting (ii) from (i)

We get,

- 3y - y = 9 - 13

=> - 4y = - 4

=> y = 1

Putting this Value in (i)

We get,

2x - 3(1) = 9

=> 2x = 9 + 3 = 12

=> x = 12/2 = 6.

Thus,

( x , y ) = ( 6 , 1 ).

Answer 2

Answer:

2x - 3y = 9 (equation 1)

2x + y = 13 ( equation 2)

-----------------

-2y = -4

y= 2

Substituting y= 2 in 2nd equation

2x + 2 = 13

2x= 13-2

2x= 11

x = 5.5

(x,y) = (5.5 , 2)