One way to think about solving equations is to think of equations as a function machine and then create the reverse function machine to solve the equation, as shown in the following example:

Examples

• Let’s try this same approach to solve:
  • 4x+7 = 19
  • 8y-12 = 28
  • 3z – 6 = 27.

Exercise

Let’s complete questions 2 to 5 of exercise 8B on page 118:

The answers are below: