Chapter 9 - XYZ Custom Plus

Chapter 9 Review
Simplify the expressions by combining similar terms. [9.1]
1. 10x 1 7x
2. 8x 2 12x
3. 2a 1 9a 1 3 2 6
4. 4y 2 7y 1 8 2 10
5. 6x 2 x 1 4
6. 25a 1 a 1 4 2 3
7. 2a 2 6 1 8a 1 2
8. 12y 2 4 1 3y 2 9
Find the value of each expression when x is 4. [9.1]
9. 10x 1 2 10. 5x 2 12 11. 22x 1 9 12. 2x 1 8
13. Is x 5 23 a solution to 5x 2 2 5 217? [9.2] 14. Is x 5 4 a solution to 3x 2 2 5 2x 1 1? [9.2]
Solve the equations. [9.2, 9.3, 9.4]
15. x 2 5 5 4
19. 2x 1 4 5 3x 2 5
23. 3(2x 1 1) 2 4 5 27
16. 2x 1 3 1 2x 5 6 2 7
20. 4x 1 8 5 2x 2 10
24. 4(3x 1 1) 5 22(5x 2 2)
17. 2x 1 1 5 7
18. 3x 2 5 5 1
21. 3(x 2 2) 5 9
22. 4(x 2 3) 5 220
25. 5x 1 } 3 8 } 5 2}1 4 } 26. } 7 x } 2 }2 5 } 5 1
27. Number Problem The sum of a number and 23 is 25.
Find the number. [9.5]
28. Number Problem If twice a number is added to 3, the result
is 7. Find the number. [9.5]
29. Number Problem Three times the sum of a number and 2
is 26. Find the number. [9.5]
30. Number Problem If 7 is subtracted from twice a number,
the result is 5. Find the number. [9.5]
31. Geometry The length of a rectangle is twice its width.
If the perimeter is 42 meters, find the length and the
width. [9.5]
32. Age Problem Patrick is 3 years older than Amy. In 5
years the sum of their ages will be 31. How old are they
now? [9.5]
In Problems 33-36, use the equation 3x 1 2y 5 6 to find y. [9.6]
33. x 5 22 34. x 5 6 35. x 5 0 36. x 5 ​ 1 _
3 ​
In Problems 37–39, use the equation 3x 1 2y 5 6 to find x when y has the given value. [9.6]
37. y 5 3 38. y 5 23 39. y 5 0
Chapter 9
Review
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