Question

(iv) 2y - x=0; 10x + 15y = 105​

Answer 1

20

Answer 2

Answer:

(iv) 2y - x=0

or,2y=x

or,y=x/2

10x + 15y = 105

or,15y=105-10x

or,y=105-10x/15

or,y=5 (21-2x)/15

or,y=21-2x/3

x/2=21-2x/3

or,3x=42-4x

or,3x+4x=42

or,7x=42

or,x=42/7

or,x=6

2y - x=0

or,2y-6=0 (x=6)

or,2y=6

or,y=6/2

or,y=3

So,x=6 and y=3 is the correct answer.

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