1 Answer 1 vote Standard from of an equation is ax by c = 0 1) y 3 = 1/2 (x 6) Cross multiplication 2y 6 = x 6 x 2y = 0 2) y 4 = 2/3 (x 5)Therefore, cost of one pencil = Rs 3 and cost of one pen = Rs 5 2 On comparing the ratios 2, b 1 /b 2 and c 1 /c 2, find out whether the lines representing the following pairs of linear equations intersect at a point, are parallel or coincident Answer (i) 5x – 4y 8 = 0 7x 6y – 9 = 0 Comparing these equation with a 1 x b 1 y c 1 = 0 a 2 x b 2 y c 2 = 0 Ex 36, 1 Solve the following pairs of equations by reducing them to a pair of linear equations(i) 1/2𝑥 1/3𝑦 = 2 1/3𝑥 1/2𝑦 = 13/6 1/2𝑥 1/3𝑦 = 2 1/3𝑥 1/2𝑦 = 13/6Let 1/𝑥 = u 1/𝑦 = v So, our equations become1/2 u 1/3 v = 2 (3𝑢 2𝑣)/(2 × 3) = 2
The Substitution Method
