Karim thinks of a number.
(a)He multiplies his number by 5, then adds 7. The result is 82. Write down an equation in k to represent this, where k is Karim's number. (1 mark)(1)
(b)Solve your equation to find the value of k. (2 marks)(2)
(c)Karim's friend's number is 4 less than twice Karim's number. Find the friend's number. (1 mark)(1)
(Total for Question 23 is 4 marks)