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Question

Find the equation of the line passing through the point of intersection of the lines 4x+7y3=0 and 2x3y+1=0 that has equal intercepes on the axis.

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Solution

Let the equation of the line having equal intercepts on the axes be
xa+ya=1

Or x+y=a ___(i)

On solving equations 4x+7y3=0 and 2x3y+1=0, we obtain x=113 and y=513

(113,513) is the point of the intersection of the two given lines.

Since equation (1) passes through point (113,513).

113+513=a

a=613

Equation (1) becomes x+y=613, i.e., 13x+13y=6.

Thus, the required equation of the line 13x+13y=16.

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