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    Work: Find the solution of equation x*0.3+30 = x*0.6 .
    Question type: Equation
    Solution:Original question:

x

×

3 10

+

30

=

x

×

3 5

    Transposition :

3 10

x

−

3 5

x

=

-

30

    Combine the items on the left of the equation:

-

3 10

x

=

-

30

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

30

=

3 10

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 :

3 10

x

=

30

    The coefficient of the unknown number is reduced to 1 :

x

=

30

÷

3 10

=

30

×

10 3

=

10

×

10

    We obtained :

x

=

100

    This is the solution of the equation.

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