New Worksheet - Math - Substitution (II)

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

1. If y = 8, evaluate: 2y + x + y + 11
What is the expression worth? _____________

2. If x = -10, evaluate: 4y + 5x + 2
What is the expression worth? _____________

3. If y = 8, evaluate: 4x + y – y + 7
What is the expression worth? _____________

4. If x = 10, evaluate: x + y + 7x + 5
What is the expression worth? _____________

5. If x = 7, evaluate: 8x + y + x + 9
What is the expression worth? _____________

6. If y = 5, evaluate: 9y + 8x + 10
What is the expression worth? _____________

7. If x = -5, evaluate: 4y + 7x + 9
What is the expression worth? _____________

8. If x = 6, evaluate: 6(x + y) + 6x + 11
What is the expression worth? _____________

9. If y = 11, evaluate: 4y + 9x + 6
What is the expression worth? _____________

10. If x = 7, evaluate: 6x – 3y + 5
What is the expression worth? _____________


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