optionalpracticeanswers

Optional Practice Answers

Practice Pages 47 and 48

Chapter 3 Writing Equations

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The following equations and answers to both pages are on the right.

Remember to show your work when solving equations.

Practice Page 47

1. n-6=8; n=14

2. 2m=28;m = 14

3. 5a=35, a = 7

4. w+12=32; w = 20

5. x/6 = -4; x = -24

6. x-8=18; x = 26

7. -9d=36; x = -4

8. 14+n=29; n = 15

9. 12t=48; t = 4

10. 24+n=52; n = 28

11. x squared = 36 x * x = 36;x=6

12. k/-9=-6; x= 54

13. n+14=11; n = -3

14. 8c=-56; c = -7

15. m-14=11; m = 25

16. 3x+4=28; x= x=8

17. 2x-12=8; x=10

18. g+3=14; g=11

19. j-4=16; j= 20

20. r+4=9; r=5

21. x/6=45; x = 270

Practice 48

1. 5 + x = 14 ; x=9 matches were won his first year

2. 45+ x = 875; x= 830 attended last year

3. x-.85=6.25; x= $7.10

4. 45=15 + 2x; x= $15

5. 3d+7 = 52 ; d= 15 years

6. 6x+ 15,000= 165,000; x= $25,000

7. 2x-19=139 ; x= $79

8. 5+3x= 170; x = 55 miles per hour