Substituting Values into Expressions

Name: _______________________________

Date: _______________________________

Instructions:

Replace the variable with the given number and calculate the answer. Show your working.

Example: If n = 4, find 3n + 5 → 3 × 4 + 5 = 12 + 5 = 17

Part A: Find the value of each expression when n = 6

1. n + 8 = __________________

2. 2n = __________________

3. 3n + 4 = __________________

4. 5n - 10 = __________________

5. 4n + 7 = __________________

6. 20 - n = __________________

Part B: Find the value of each expression when x = 5

1. x + 12 = __________________

2. 6x = __________________

3. 2x + 9 = __________________

4. 4x - 5 = __________________

5. 10x + 3 = __________________

6. 50 - 3x = __________________

Part C: Find the value of each expression when a = 10

1. a - 7 = __________________

2. 3a = __________________

3. 2a + 15 = __________________

4. 5a - 20 = __________________

5. a + 2a = __________________

6. 100 - 4a = __________________

Part D: Mixed Practice - Substitute the given value

1. If b = 8, find 3b + 6 = __________________

2. If y = 4, find 5y - 8 = __________________

3. If m = 7, find 2m + 10 = __________________

4. If p = 3, find 6p + 1 = __________________

5. If t = 12, find 4t - 20 = __________________

Challenge Question ⭐

If k = 9, find the value of 2k + 3k = __________________