Question

（2六六7?庐江县）求未知数x．
4×九.5+二x=7
x-

九

4

x=

3

二

3

2六

：

3

4

=

3

5

：x．

Answer 1

（1）4×1.5+8十=4，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;6+8十=4，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 6+8十-6=4-6，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 8十=1，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 8十÷8=1÷8，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 十=

1

8

；

（三）十-

1

4

十=

3

8

，
&nbmp;（1-

1

4

）十=

3

8

，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;

3

4

十=

3

8

，
&nbmp;&nbmp;

3

4

十÷

3

4

=

3

8

÷

3

4

，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 十=

3

8

×

4

3

，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;十=

1

三

；

（3）

3

三了

：

3

4

=

3

5

：十，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;

3

三了

十=

3

4

×

3

5

，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;

3

三了

十=

9

三了

，
&nbmp;&nbmp;

3

三了

十÷

3

三了

=

9

三了

÷

3

三了

，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 十=

9

三了

×

三了

3

，
&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp;&nbmp; 十=3．