optionalpracticeanswers
Optional Practice Answers
Practice Pages 47 and 48
Chapter 3 Writing Equations
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