Respuesta :

Answer:

x+2y= -10......eqn(i)

3x-y=12.........eqn(ii)

multiply the eqn(ii) by 2

x+2y= -10

6x-y=12

or, 7x=14

or, x=14/7

or, x=2

now, substituting the value of x=2 in eqn(i)

x+2y= -10

or, 2+2y= -10

or, 2y= -10-2

or, 2y= -12

or, y= -12/2

or, y= -6

therefore the equation is proved

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