How it works
Put the number in. If both sides match, or the sign is true, it works.
9y = 63: try 7: 9 × 7 = 63, so y = 7.
For an inequality, count how many numbers in the list make it true.
Worked examples
Try each number
- 9y = 63 for y in 5, 7, 8
- Test 5, 7 and 8 in 9y.
- Only 7 gives 63.
- So the answer is y = 7.
Subtract too
- 3k − 5 = 13 for k in 6, 7, 18
- 3 × 6 − 5 = 13.
- So k = 6 works.
- So the answer is k = 6.
Count the true ones
- 4t − 1 > 15 for t in 1, 2, 3, 4, 5
- Test t = 1 to 5 in 4t − 1 > 15.
- Only t = 5 gives 19, which is more than 15.
- So the answer is 1.
A taste of the worksheet
These are the first problems of set A. The printable sheet has many more, with an answer key.
- 9 = k + 3 with k = 9
- 2 + y = 6 for y in 0, 4, 5
- 7 = k + 2 with k = 5
- 3 + k = 11 for k in 4, 6, 8
- 3 + k = 10 with k = 7
Words to know
- solution
- A number that makes it true.