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    Work: Find the solution of equation 0.8X/(1-0.8X) = 23 .
    Question type: Equation
    Solution:Original question:

4 5

X

÷

(

1

−

4 5

X

)

=

23

Multiply both sides of the equation by:

(

1

−

4 5

X

)

4 5

X

=

23

(

1

−

4 5

X

)

    Remove a bracket on the right of the equation:：

4 5

X

=

23

×

1

−

23

×

4 5

X

    The equation is reduced to :

4 5

X

=

23

−

92 5

X

    Transposition :

4 5

X

+

92 5

X

=

23

    Combine the items on the left of the equation:

96 5

X

=

23

    The coefficient of the unknown number is reduced to 1 :

X

=

23

÷

96 5

=

23

×

5 96

    We obtained :

X

=

115 96

    This is the solution of the equation.

    Convert the result to decimal form :

X

=

1.197917

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