Question

解方程．

1

2

x÷

1

2

=

3

4

2

3

x-

1

5

x=1

5

9

x-

2

3

=

5

6

．

Answer 1

①

1

2

x÷

1

2

=

3

4

1

2

x×2=

3

4

x=

3

4

②

2

3

x-

1

5

x=1

7

15

x=1
x=

15

7

③

5

9

x-

2

3

=

5

6

5

9

x-

2

3

+

2

3

=

5

6

+

2

3

5

9

x=

9

6

5

9

x×

9

5

=

9

6

×

9

5

x=

27

10