Algebra Demystified 2nd Ed

198 algebra De mystif ieD

✔SOLUTION

1.^1
2

3 3

5

xx+= − 1

The LCD is 10.

101

2

3103

5

1

10 1

2

10310

xx

x

 +







=−















+=()^33

5

101

530610

55

30 10

10 10

4

x

xx

xx

x









−

+=−

−−

=−

++

()

00 =x

2.^16 xx−= 31 23 − 125

The LCD is 12.

12 1

6

1

3

122

3

5

12

12 1

6

12 1

3

xx

x

−









=−

















− 







= 







− 







−= −

−−

−

122

3

12 5

12

2485

22

4

x

xx

xx

==−

++

=

=

=

65

55

16

1

6

6

6

1

6

x

x

x

x