Question

show that x=2, y=1 is a solution of the equation 2x+7y=11;x-3y=5​

Answer 1

Step-by-step explanation:

We Have :-

$2x + 7y = 11 \\ \\ \\ x - 3y = 5$

To Show :-

$x = 2 \\ \\ \\ y = 1 \\ \\ \\ is \: a \: solution \: of \: the \: equations$

Solution :-

$2x + 7y = 11 \\ \\ \\ to \: check \: we \: will \: put \: the \: given \: values \: of \: x \: and \: y \\ \\ \\ 2(2) + 7(1) = 11 \\ \\ \\ 4 + 7 = 11 \\ \\ \\ 11 = 11 \\ \\ \\ hence \: verified$

Answer 2

Answer:

x=68/13, y=1/13

Step-by-step explanation:

2x+7y=11......( 1 )

x-3y=5..... ( 2)

multiply by 2 in equation( 2 )

2x-6y=10

equation ( 2 ) subtract by equation ( 1 )

2x+7y-2x+6y=11-10

13y=1

y=1/13

keep the value of y in equation ( 1 )

2x+7*1/13=11

2x=11-7/13

2x=(143-7) /13

2x=136/13

x=136/26

x=68/13