Advanced Topics
In a nutshell: Equations with variables help you solve unknowns in many situations.
## Creating Equations
You can write equations to solve word problems using variables. An equation has an equals sign and shows that two things are the same.
## Solving Equations
- Find what the variable stands for.
- Do the same thing to both sides to keep the balance.
- Check your answer by plugging it back in.
## Real-World Examples
If you know your total spending is $30 and each movie ticket costs $6, you can write \(6x = 30\) to find out how many tickets you bought.
Examples
- If \(x + 5 = 12\), then \(x = 7\).
- If 4 notebooks cost $16, then each notebook costs $x, so \(4x = 16\).