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In this activity, all the answers must be whole positive numbers or zero.
An equation with two variables involves two numbers which must be found.
Look at this equation:
a + b = 8
The two numbers, a and b, must add to 8.
They are whole positive numbers or zero.
What could they be?
If a is 0, b must be 8.
If a is 1, b must be 7.
If a is 2, b must be 6 etc....
The results can be shown in a table:
| a | b |
|---|---|
| 0 | 8 |
| 1 | 7 |
| 2 | 6 |
| 3 | 5 |
| 4 | 4 |
| 5 | 3 |
| 6 | 2 |
| 7 | 1 |
| 8 | 0 |
There are nine solutions.
Let's try some questions on this now.
