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    Work: Find the solution of equation (61.2+0.18x)/(93+0.6x) = 0 .
    Question type: Equation
    Solution:Original question:

(

306 5

+

9 50

x

)

÷

(

93

+

3 5

x

)

=

0

Multiply both sides of the equation by:

(

93

+

3 5

x

)

(

306 5

+

9 50

x

)

=

0

    Remove a bracket on the left of the equation:：

306 5

+

9 50

x

=

0

    Transposition :

9 50

x

=

0

−

306 5

    Combine the items on the right of the equation:

9 50

x

=

-

306 5

    The coefficient of the unknown number is reduced to 1 :

x

=

-

306 5

÷

9 50

=

-

306 5

×

50 9

=

-

34

×

10

    We obtained :

x

=

-

340

    This is the solution of the equation.

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