Question

Solve x+y=7 and 2x-3y=11 by using elimination method

Answer 1

Answer:

1) Given Equation is x + y = 7

                                   x = 7 - y      --------- (1)

(2) 2x - 3y = 11

    2(7 - y) - 3y = 11

    14 - 2y - 3y = 11

     14 - 5y = 11

          -5y = 11 - 14

         -5y = -3

            y = 

Substitute y =  in (1), we get

x = 7 - 

 

  = 

  = 

Therefore the value of x = , y = 

Hope this helps!

Step-by-step explanation:

Answer 2

Answer:

(X , Y = 32/5 , 3/5)

Step-by-step explanation:

x + y = 7 ------------- ( 1)

2x - 3y = 11 ---------- ( 2)

according to the elimination method

eqn (1) × 3 = 3x + 3y = 21

eqn(2)× 1 = 2x - 3y = 11

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

addition 5x =. 32 ( +3y -3y =0)

=>. x = 32/5

put the value of x in eqn (1)

x+y =7

=> 32/5+y =7

=>y = 7- 32/5

=> y = 35- 32

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

5

=> y = 3/5