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Algebra might sound complicated, but it is really just using letters to stand for numbers you do not know yet. In the GL 11+ exam, you will need to understand simple expressions, solve equations, and work with number sequences. This lesson teaches you how.
In algebra, we use letters (called variables) to represent unknown numbers.
| Expression | Meaning |
|---|---|
| a + 5 | A number plus 5 |
| 3b | 3 times a number |
| c - 7 | A number minus 7 |
| d/4 | A number divided by 4 |
| 2n + 1 | Double a number, then add 1 |
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