Question

E 17. Solve the pair of linear equations by elimination method. 2x + y = 3 4x - y = 9 ​

Answer 1

Step-by-step explanation:

2x + y = 3

2 multiply by 1 + 1 = 3

x=1 , y =1

4x -y = 9

x=3, y = 3

Answer 2

Answer:

Solution for given equations are x = 2 and y = -1

Step-by-step explanation:

Given equations   $2x +y =3$ _ (1)  

                               $4x - y =9$ _ (2)

here we need to solve equation (1) and (2)  by elimination method  

⇒ add equation (1) and equation (2)

⇒  $2x + y + 4x-y = 3 + 9$

⇒   $6x = 12$    

⇒   x = 2

substitute x = 2 in equation (1) ⇒   2(2) + y = 3

                                                  ⇒   4 + y = 3

                                                  ⇒   y = -1

⇒ solution for given equations are x = 2 and y = -1