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    Work: Find the solution of equation 15+2x+2x = 23 .
    Question type: Equation
    Solution:Original question:

15

+

2

x

+

2

x

=

23

Left side of the equation =

15

+

4

x

    The equation is transformed into :

15

+

4

x

=

23

    Transposition :

4

x

=

23

−

15

    Combine the items on the right of the equation:

4

x

=

8

    The coefficient of the unknown number is reduced to 1 :

x

=

8

÷

4

=

8

×

1 4

=

2

×

1

    We obtained :

x

=

2

    This is the solution of the equation.

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