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    Work: Find the solution of equation [4（1+x） ) = 0 .
    Question type: Equation
    Solution:Original question:

(

4

(

1

+

x

)

)

=

0

    Remove the bracket on the left of the equation:

Left side of the equation =

4

(

1

+

x

)

=

4

×

1

+

4

x

=

4

+

4

x

    The equation is transformed into :

4

+

4

x

=

0

    Transposition :

4

x

=

0

−

4

    Combine the items on the right of the equation:

4

x

=

-

4

    The coefficient of the unknown number is reduced to 1 :

x

=

-

4

÷

4

=

-

4

×

1 4

=

-

1

×

1

    We obtained :

x

=

-

1

    This is the solution of the equation.

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