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[ 1/1 Equation]
    Work: Find the solution of equation X5+10X3+20X-4 = 0 .
    Question type: Equation
    Solution:Original question:

X

×

5

+

10

X

×

3

+

20

X

−

4

=

0

Left side of the equation =

X

×

5

+

30

X

+

20

X

−

4

=

55

X

−

4

    The equation is transformed into :

55

X

−

4

=

0

    Transposition :

55

X

=

0

+

4

    Combine the items on the right of the equation:

55

X

=

4

    The coefficient of the unknown number is reduced to 1 :

X

=

4

÷

55

=

4

×

1 55

    We obtained :

X

=

4 55

    This is the solution of the equation.

    Convert the result to decimal form :

X

=

0.072727

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