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    Work: Find the solution of equation 6/r-5/r = 0.2 .
    Question type: Equation
    Solution:Original question:

6

÷

r

−

5

÷

r

=

1 5

Multiply both sides of the equation by:

r

6

−

5

÷

1

×

1

=

1 5

r

    Transposition :

-

1 5

r

=

-

6

+

5

÷

1

×

1

    Calculate the items on the right of the equation:

-

1 5

r

=

-

6

+

5

    Combine the items on the right of the equation:

-

1 5

r

=

-

1

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

1

=

1 5

r

    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 :

1 5

r

=

1

    The coefficient of the unknown number is reduced to 1 :

r

=

1

÷

1 5

=

1

×

5

    We obtained :

r

=

5

    This is the solution of the equation.

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