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By the graphical method, find whether th...

By the graphical method, find whether the following pair of equations are consistent of not. If consistent, solve them.
(i)`3x + y + 4 = 0, 6x - 2y + 4 = 0`
(ii) `x - 2y = 6, 3x - 6y = 0`
(iii) `x + y = 3, 3x + 3y = 9 `

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The correct Answer is:
`(a_(1))/(a_(2))= (b_(1))/(b_(2)) ne (c_(1))/(c_(2))`
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