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On comparing the ratios a1/a2,b1/b2 and ...

On comparing the ratios `a_1/a_2,b_1/b_2 and c_1/c_2` find out whether the lines representing the following pairs of linear equations intersect at a point are parallel or coincident:
`5x-4y+8=0,7x+6y-9=0`

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