Question

Solve : x-2y =7

2 x-6y=0 ​

Answer 1

Answer:

x=21/5

y=7/5

Step-by-step explanation:

x=7-2y

2x-6y=0

2(7-2y)-6y=0

14-4y-6y=0

10y=14

y=7/5

x=7-2(7/5)

x=7-14/5

x=(35-14)/5

x=21/5

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Answer 2

Step-by-step explanation:

$x - 2y = 7 \\ or. \: \: x = 7 + 2y \: \: \: - - (i) \\ \\ 2x - 6y = 0 \\ or. \: \: 2x = 6y \\ or. \: \: x = 3y \: \: \: - - (ii) \\ \\ then. \: \: 7 + 2y = 3y \\ or. \: \: 3y - 2y = (- 7) \\ or. \: \: y = ( - 7)$

In equation (i), we put y = (- 7) then,

$x = 7 + 2.( - 7) \\ = 7 - 14 \\ = - 7$

$x = ( - 7). \: \: \: \: y = ( - 7)$