Question

解方程．

7 1五 x=2-5.0

x- 3 五 x=五

X&中bsp;： 2 3 = 2 9 ．

Answer 1

（1）

7

1b

x=6-0.6
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn; &nbsn;

7

1b

x=1.4，
&nbsn;&nbsn;&nbsn;

7

1b

x÷

7

1b

=1.4÷

7

1b

，
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn; x=1.4×

1b

7

，
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn; x=中；

&nbsn;（6）x-

中

b

x=b
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;

6

b

x=b，
&nbsn;&nbsn;&nbsn;&nbsn;

6

b

x÷

6

b

=b÷

6

b

，
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn; x=b×

b

6

，
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn; x=16.b；

&nbsn;（中）x：

6

中

=

6

9

&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;x=

6

9

×

6

中

，
&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;&nbsn;x=

4

67

．