Question

(iv) 2y – x=0; 10x + 15y = 105 elimination equation
​

Answer 1

equation 1×10

-10x+20y=0

10x+15y=105

35y=105

y=3

2y-3=0

2y=3

y=3/2

HOPE IT'S HELPFUL....

Answer 2

Answer:

2y − x = 0 ⇒x=2y .....(I)

10x + 15y = 105 .....(II)

Taking out 5 common from (II)

2x+3y=21 .....(III)

From (I) and (III)

2(2y)+3y=21

⇒4y+3y=21

⇒7y=21

⇒y=3

x=2×3

=6