Question

Solution : 3x + 2y = 29. . . (I) and 5x - y = 18 . . . (II)

Let’s solve the equations by eliminating ’y’. Fill suitably the boxes below.

Multiplying equation (II) by 2.

\ 5x ´ - y ´ = 18 ´

\ 10x - 2y = . . . (III)

Let’s add equations (I) and (III)

3x + 2y = 29

+ - =

= \ x =

Substituting x = 5 in equation (I)

3x + 2y = 29

\ 3 ´ + 2y = 29

\ + 2y = 29

\ 2y = 29 -

\ 2y = \ y =

(x, y) = ( , ) is the solution.

Ex. (3) Solve : 15x + 17y = 21; 17x + 15y = 11

Solution : 15x + 17y = 21. . . (I)

17x + 15y = 11 . . . (II)​

Answer 1

Answer:

15x+17y=12 ;17x+15y=11

Step-by-step explanation:

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