Evaluate \dfrac13m-1-\dfrac12n 3 1 m−1− 2 1 nstart fraction, 1, divided by, 3, end fraction, m, minus, 1, minus, start fraction, 1, divided by, 2, end fraction, n when m=21m=21m, equals, 21 and n=12n=12n, equals, 12.

Step-by-step explanation:

Given the following expression:

You know that the value of "m" is:

And the value of "n" is:

Knowing these values, you must substitute them into the given expression:

So, in order to evaluate, the first step is to solve the multiplications and then you must reduce the fractions. Then:

Now, you must solve the subtraction.

You get that the difference (which is the result of the subtraction) is the following:

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