1.

Find the equation of the line passing through the point of intersection of the lines `4x+7y-3=0 and 2x-3y+1=0`, which has equal intercepts on the axes.

Answer» Let the point equation of the required line be `(x)/(a)+(y)/(a)=1`
i.e. x+y=a …..(i)
The equation of the given line are
`4x+7y=3......(i)`
`2x-3y=-1......(ii)`
On solving (ii) and (iii), we get `x=(1)/(13), y=(5)/(13)`
So, the point of intersection of the given line is `P((1)/(13),(5)/(13))`
Putting `x=(1)/(13) and y=(5)/(13)` in (i), we get `a=((1)/(13)+(5)/(13))=(6)/(13)`
Hence, the required equation is `x+y=(6)/(13)`
i.e. 13x+13y-6=0


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