
Variable is a symbol that represents a mathematical object.
Example
Consider the expression: 2x+1;
You can replace the variable x with any mathematical object and then calculate the result.
x | Expression | Result | 3 | 2∗3+1 | 7 |
364 | 2∗364+1 | 9 |
log4(16384) | 2∗log4(16384)+1 | 15 |
The Chef

A chef sells a delicious hamburger for just $2.99 per unit.
x∗2.99=price
x (quantity) | Expression | Result | 4 | 4∗2.99 | 11.96 |
13 | 13∗2.99 | 38.87 |
999 | 999∗2.99 | 2987.01 |
The Elekid Worker

An Elekid generates energy for a small town, having its own efficiency and base watts generated per hour.
x∗y∗24=watts per day
x (base) | y (efficiency) | Expression | Result | 1200 | 1.2 | 1200∗1.2∗24 | 34560 |
2000 | 0.9 | 2000∗0.9∗24 | 43200 |
950 | 8 | 950∗8∗24 | 182400 |