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    Work: Find the solution of equation x/(4000+0.12x) = 2 .
    Question type: Equation
    Solution:Original question:

x

÷

(

4000

+

3 25

x

)

=

2

Multiply both sides of the equation by:

(

4000

+

3 25

x

)

x

=

2

(

4000

+

3 25

x

)

    Remove a bracket on the right of the equation:：

x

=

2

×

4000

+

2

×

3 25

x

    The equation is reduced to :

x

=

8000

+

6 25

x

    Transposition :

x

−

6 25

x

=

8000

    Combine the items on the left of the equation:

19 25

x

=

8000

    The coefficient of the unknown number is reduced to 1 :

x

=

8000

÷

19 25

=

8000

×

25 19

    We obtained :

x

=

200000 19

    This is the solution of the equation.

    Convert the result to decimal form :

x

=

10526.315789

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