This is very important question of ncert class 9th of chapter linear equations in two variables . How I solve the best solution of exercise 4.3 question number 8(2). Please help me to solve this in a easy and best way. In countries like USA and Canada, temperature is measured in Fahrenheit, whereas in countries like India, it is measured in Celsius. Here is a linear equation that converts Fahrenheit to Celsius:(ii) If the temperature is 30°C, what is the temperature in Fahrenheit?