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Q2. a. Solve for x in the following equation:  (5x + 3)/(x + 7) - (7x + 3)/(x + 2) = -3   (8)

b. The electrical resistance of a wire varies directly as the length of the wire and inversely as the square of the radius of the cross-section of the wire. A wire, 6 m long and 0.4 mm radius, has a resistance of 0.3 Ω .

Calculate the resistance of a wire of the same material, 9 m long and 0.3 mm radius. (8)