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In this worksheet, 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 9 solutions.

10 questions