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    Work: Find the solution of equation 6x+4(x-4) = 256 .
    Question type: Equation
    Solution:Original question:

6

x

+

4

(

x

−

4

)

=

256

    Remove the bracket on the left of the equation:

Left side of the equation =

6

x

+

4

x

−

4

×

4

=

6

x

+

4

x

−

16

=

10

x

−

16

    The equation is transformed into :

10

x

−

16

=

256

    Transposition :

10

x

=

256

+

16

    Combine the items on the right of the equation:

10

x

=

272

    The coefficient of the unknown number is reduced to 1 :

x

=

272

÷

10

=

272

×

1 10

=

136

×

1 5

    We obtained :

x

=

136 5

    This is the solution of the equation.

    Convert the result to decimal form :

x

=

27.2

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