2x – 3y = 7
(k + 1) x + (1 – 2k) y = 5k – 4
Sol .
Q. 19. Draw a circle of radius 3 cm. From a point 5 cm from the centre of the circle, draw two tangents to the circle. Measure the length of each tangent.
Sol. 
PA and PB are the required tangents By measurement, PA = PB = 4 cm
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