Farah thinks of a number.
(a)She multiplies her number by 4, then adds 9. The result is 65. Write down an equation in f to represent this, where f is Farah's number. (1 mark)(1)
(b)Solve your equation to find the value of f. (2 marks)(2)
(c)Farah's friend Idil's number is 5 less than twice Farah's number. Find Idil's number. (1 mark)(1)
(Total for Question 23 is 4 marks)