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    Work: Find the solution of equation (720-12x/5)+2x = 130 .
    Question type: Equation
    Solution:Original question:

(

720

−

12

x

÷

5

)

+

2

x

=

130

    Remove the bracket on the left of the equation:

Left side of the equation =

720

−

12

x

÷

5

+

2

x

=

720

−

12 5

x

+

2

x

=

720

−

2 5

x

    The equation is transformed into :

720

−

2 5

x

=

130

    Transposition :

-

2 5

x

=

130

−

720

    Combine the items on the right of the equation:

-

2 5

x

=

-

590

    By shifting the terms and changing the symbols on toth sides of the equation, we obtain :

590

=

2 5

x

    If the left side of the equation is equal to the right side, then the right side must also be equal to the left side, that is :

2 5

x

=

590

    The coefficient of the unknown number is reduced to 1 :

x

=

590

÷

2 5

=

590

×

5 2

=

295

×

5

    We obtained :

x

=

1475

    This is the solution of the equation.

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