Question

Solve : 2y-x=0;10x+15y=105

Answer 1

Answer:

2y = x

value of x = 2y

putting value ,

10 ( 2y ) + 15 y = 105

20 y + 15 y = 105

35 y = 105

y = 105/35

y = 3

value of y = 3

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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