New Worksheet - Math - Substitution

If x + y = 0, then solve the problems below.

1. If y = 3, evaluate: 2y + x + y + 1
What is the expression worth? _____________

2. If x = -5, evaluate: 2y + 2x + 5
What is the expression worth? _____________

3. If y = 4, evaluate: 3x + y – y + 10
What is the expression worth? _____________

4. If x = 2, evaluate: x + y + 3x + 4
What is the expression worth? _____________

5. If x = 1, evaluate: 2x + y + x + 6
What is the expression worth? _____________

6. If y = 2, evaluate: 2y + 3x + 4
What is the expression worth? _____________

7. If x = -3, evaluate: 4y + 3x + 7
What is the expression worth? _____________

8. If x = 7, evaluate: 2(x + y) + 2x + 3
What is the expression worth? _____________

9. If y = 4, evaluate: 3y + 2x + 8
What is the expression worth? _____________

10. If x = 6, evaluate: 3x – 2y + 7
What is the expression worth? _____________


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