Question

solve by elimination method x+2y = 7 and 2x-7y​

Answer 1

Answer:

if 2x - 7y = 0 then my answer is given below

Step-by-step explanation:

x  + 2y = 7    ----------(1)

2x - 7y = 0   ---------(2)

lets multiply 2 in (1) we get,

2x + 4y = 14 --------(3)

2x - 7y = 0

subtract (3) and (1)

11y = 14

y = 14/11

substuting the value of y in (1) we get,

x = 49/11

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Answer 2

Answer:

:- 2(x + 2y = 7)

2x-7y = 0

:- 2x + 4y = 14......(i)

2x - 7y = 0......(ii)

(-) (+) (-)

by solving this equation we get,

11y = 14

y = 14/11

now putting the value of y in eq. 2

2x - 7(14/11) = 0

2x = 98/11

x = (98/11)/2

x = 49/11

and

y = 14/11