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Find the equation of the line midway bet...

Find the equation of the line midway between the parallel lines `9x+6y-7=0` and `3x+2y+6=0`

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The equations of the lines are `3x+2y−7/3=0 ` ...........(1)
`3x+2y+6=0 ` ........(2)
Let the equation of the line mid-way between the parallel lines 1 and 2 be
3x+2y+lambda=0 ....(3)
Then, Distance between the lines 1 and 3 = Distance between the lines 2 and 3
...
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