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    Work: Find the solution of equation 0 = （70%-15%）-1.1%/10%*8%*（1-X） .
    Question type: Equation
    Solution:Original question:

0

=

(

70 100

−

15 100

)

−

11 1000

÷

10 100

×

8 100

(

1

−

X

)

Right side of the equation =

(

70 100

−

15 100

)

−

11 1250

(

1

−

X

)

    The equation is transformed into :

0

=

(

70 100

−

15 100

)

−

11 1250

(

1

−

X

)

    Remove the bracket on the right of the equation:

Right side of the equation =

70 100

−

15 100

−

11 1250

(

1

−

X

)

=

11 20

−

11 1250

(

1

−

X

)

=

11 20

−

11 1250

×

1

+

11 1250

X

=

11 20

−

11 1250

+

11 1250

X

=

1353 2500

+

11 1250

X

    The equation is transformed into :

0

=

1353 2500

+

11 1250

X

    Transposition :

-

11 1250

X

=

1353 2500

−

0

    Combine the items on the right of the equation:

-

11 1250

X

=

1353 2500

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

-

1353 2500

=

11 1250

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 :

11 1250

X

=

-

1353 2500

    The coefficient of the unknown number is reduced to 1 :

X

=

-

1353 2500

÷

11 1250

=

-

1353 2500

×

1250 11

=

-

123 2

×

1

    We obtained :

X

=

-

123 2

    This is the solution of the equation.

    Convert the result to decimal form :

X

=

- 61.5

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