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    Work: Find the solution of equation (6000000-4x)/x/90 = 1 .
    Question type: Equation
    Solution:Original question:

(

6000000

−

4

x

)

÷

x

÷

90

=

1

Multiply both sides of the equation by:

x

(

6000000

−

4

x

)

÷

90

=

1

x

    Remove a bracket on the left of the equation:：

6000000

÷

90

−

4

x

÷

90

=

1

x

    The equation is reduced to :

200000 3

−

2 45

x

=

1

x

    Transposition :

-

2 45

x

−

1

x

=

-

200000 3

    Combine the items on the left of the equation:

-

47 45

x

=

-

200000 3

    By shifting the terms and changing the symbols on toth sides of the equation, we obtain :

200000 3

=

47 45

x

    If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :

47 45

x

=

200000 3

    The coefficient of the unknown number is reduced to 1 :

x

=

200000 3

÷

47 45

=

200000 3

×

45 47

=

200000

×

15 47

    We obtained :

x

=

3000000 47

    This is the solution of the equation.

    Convert the result to decimal form :

x

=

63829.787234

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