I am not able to solve this question how can i easily solve the question of Pair of Linear Equations in Two Variables of exercise 3.3 by step by step the question is Form the pair of linear equations for the following problems and find their solution by substitution method.(iv) The taxi charges in a city consist of a fixed charge together with the charge for the distance covered. For a distance of 10 km, the charge paid is Rs 105 and for a journey of 15 km, the charge paid is Rs 155. What are the fixed charges and the charge per km? How much does a person have to pay for travelling a distance of 25 km?