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    Work: Find the solution of equation 1000:200 = 20:N .
    Question type: Equation
    Solution:Original question:

1000

÷

200

=

20

÷

N

Multiply both sides of the equation by:

N

1000

÷

200

×

N

=

20

    Calculate the items on the left of the equation:

5

N

=

20

    The coefficient of the unknown number is reduced to 1 :

N

=

20

÷

5

=

20

×

1 5

=

4

×

1

    We obtained :

N

=

4

    This is the solution of the equation.

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