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    Work: Find the solution of equation 2+2X+（-2）×4 = 0 .
    Question type: Equation
    Solution:Original question:

2

+

2

X

+

(

-

2

)

×

4

=

0

    Remove the bracket on the left of the equation:

Left side of the equation =

2

+

2

X

−

2

×

4

=

2

+

2

X

−

8

=

-

6

+

2

X

    The equation is transformed into :

-

6

+

2

X

=

0

    Transposition :

2

X

=

0

+

6

    Combine the items on the right of the equation:

2

X

=

6

    The coefficient of the unknown number is reduced to 1 :

X

=

6

÷

2

=

6

×

1 2

=

3

×

1

    We obtained :

X

=

3

    This is the solution of the equation.

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