Algebra Lesson R.10: What is an Equation?

Practice Exercises:

Decide whether or not each of the following is a true statement (yes or no)

1. $7+4 = 11$

2. $1-3 = 4$

3. $3 \times 5 = 15$

4. $4 \div 8 = \frac{1}{2}$

Replace the letter $x$ with the number that makes a true statement (since $x$ looks a lot like the multiplication symbol, in algebra we usually replace "$\times$" with "$\cdot$").

5. $9 + x = 13$

6. $4 \cdot x = 20$

7. $12 = 3 + x \cdot 3$