The temperature at 6 a.m. in a hill station was some degrees Celsius. By noon it rose by 7∘C and became 18∘C.
a. (i) Form an equation in T representing the above situation, where T denotes the temperature at 6 a.m.
b. (ii) Solve the equation to find the value of T.
c. (iii) Verify your answer by substitution in the equation formed in part (i).