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    Work: Find the solution of equation 1.3x*2/3+（1.3x*0.7）*1/3-x = 1020 .
    Question type: Equation
    Solution:Original question:

13 10

x

×

2

÷

3

+

(

13 10

x

×

7 10

)

×

1

÷

3

−

x

=

1020

Left side of the equation =

13 15

x

+

(

13 10

x

×

7 10

)

×

1 3

−

x

=

-

2 15

x

+

(

13 10

x

×

7 10

)

×

1 3

    The equation is transformed into :

-

2 15

x

+

(

13 10

x

×

7 10

)

×

1 3

=

1020

    Remove the bracket on the left of the equation:

Left side of the equation =

-

2 15

x

+

13 10

x

×

7 10

×

1 3

=

-

2 15

x

+

91 300

x

=

17 100

x

    The equation is transformed into :

17 100

x

=

1020

    The coefficient of the unknown number is reduced to 1 :

x

=

1020

÷

17 100

=

1020

×

100 17

=

60

×

100

    We obtained :

x

=

6000

    This is the solution of the equation.

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