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Find the values of a and b for which the...

Find the values of `a` and `b` for which the following system of linear equations has infinite number of solutions: `2x-3y=7,\ \ \ \ (a+b)x-(a+b-3)y=4a+b`

A

` a= 5, b = 1 `

B

` a= - 5, b = 1 `

C

` a = 5, b = - 1`

D

`a = - 5, b = - 1 `

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The correct Answer is:
D
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