Worked-out Problems
Worked-out Problems
Worked-out Problems
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Chapter 3 continued<br />
6. w 18 7<br />
2<br />
w 18 18 7 18<br />
2<br />
w 2 11<br />
2 w 2 2(11)<br />
w 22<br />
Check: w 18 7<br />
2<br />
2 2<br />
18<br />
2<br />
7<br />
7 7 ✓<br />
7. 2 5t 3 34<br />
5t 1 34<br />
5t 1 1 34 1<br />
5t 35<br />
5 t<br />
3 5<br />
<br />
5 5<br />
t 7<br />
Check: 2 5t 3 34<br />
2 5(7) 3 34<br />
34 34 ✓<br />
8. 3y 15 y 39<br />
4y 15 39<br />
4y 15 15 39 15<br />
4y 24<br />
4y<br />
24<br />
<br />
4<br />
4<br />
y 6<br />
Check: 3y 15 y 39<br />
3(6) 15 (6) 39<br />
39 39 ✓<br />
9. 5(n 2) 10<br />
5n 10 10<br />
5n 10 10 10 10<br />
5n 0<br />
5 n<br />
0 5 5 <br />
n 0<br />
Check: 5(n 2) 10<br />
5(0 2) 10<br />
10 10 ✓<br />
10. 2 5(h 3) 28<br />
2 5h 15 28<br />
5h 13 28<br />
5h 13 13 28 13<br />
5h 15<br />
5<br />
<br />
h<br />
5<br />
15<br />
<br />
5<br />
h 3<br />
Check: 2 5(h 3) 28<br />
2 5(3 3) 28<br />
28 28 ✓<br />
11. 5s 7s 1 2s<br />
5s 5s 1<br />
5s 5s 5s 1 5s<br />
0 1<br />
No solution<br />
12. 4d 5 d<br />
4d 5 4d d 4d<br />
5 5d<br />
5<br />
5d<br />
<br />
5<br />
5<br />
1 d<br />
Check: 4d 5 d<br />
4(1) 5 1<br />
1 1 ✓<br />
13. 17 5m 50 6m<br />
17 5m 5m 50 6m 5m<br />
17 50 11m<br />
17 50 50 11m 50<br />
33 11m<br />
33<br />
11<br />
1 1m<br />
1 <br />
1<br />
3 m<br />
Check: 17 5m 50 6m<br />
17 5(3) 50 6(3)<br />
32 32 ✓<br />
14. 3f 12 3( f 12)<br />
3f 12 3f 36<br />
3f 12 3f 3f 36 3f<br />
12 36<br />
No solution<br />
15. 8(4p 1) 32p 8<br />
32p 8 32p 8<br />
Every number is a solution.<br />
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All rights reserved.<br />
Chapter 3<br />
Pre-Algebra 89<br />
<strong>Worked</strong>-Out Solution Key
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