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    Work: Find the solution of equation （x-250）（8+290-x/5x4） = 480 .
    Question type: Equation
    Solution:Original question:

(

x

−

250

)

(

8

+

290

−

x

÷

5

×

x

×

4

)

=

480

    Remove the bracket on the left of the equation:

Left side of the equation =

x

(

8

+

290

−

x

÷

5

×

x

×

4

)

−

250

(

8

+

290

−

x

÷

5

×

x

×

4

)

=

x

×

8

+

x

×

290

−

x

x

÷

5

×

x

×

4

−

250

(

8

+

290

−

x

÷

5

×

x

×

4

)

=

x

×

8

+

x

×

290

−

x

x

×

4 5

x

−

250

(

8

+

290

−

x

÷

5

×

x

×

4

)

=

298

x

−

x

x

×

4 5

x

−

250

(

8

+

290

−

x

÷

5

×

x

×

4

)

=

298

x

−

x

x

×

4 5

x

−

250

×

8

−

250

×

290

+

250

x

=

298

x

−

x

x

×

4 5

x

−

2000

−

72500

+

200

x

x

=

298

x

−

x

x

×

4 5

x

−

74500

+

200

x

x

    The equation is transformed into :

298

x

−

x

x

×

4 5

x

−

74500

+

200

x

x

=

480

    The solution of the equation:
        x₁≈-19.357880 , keep 6 decimal places
        x₂≈19.367538 , keep 6 decimal places    
    There are 2 solution(s).

解程的详细方法请参阅：《方程的解法》

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