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    Work: Find the solution of equation -2 = 7(-8-2x) .
    Question type: Equation
    Solution:Original question:

-

2

=

7

(

-

8

−

2

x

)

    Remove the bracket on the right of the equation:

Right side of the equation =

-

7

×

8

−

7

×

2

x

=

-

56

−

14

x

    The equation is transformed into :

-

2

=

-

56

−

14

x

    Transposition :

14

x

=

-

56

+

2

    Combine the items on the right of the equation:

14

x

=

-

54

    The coefficient of the unknown number is reduced to 1 :

x

=

-

54

÷

14

=

-

54

×

1 14

=

-

27

×

1 7

    We obtained :

x

=

-

27 7

    This is the solution of the equation.

    Convert the result to decimal form :

x

=

- 3.857143

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