Question

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.

Answer 1

Answer: The answer is 0 in khan academy

Explanation:

Answer 2

Answer:
`0`

Explanation:

Given the following expression:

`(1)/(3)m-1-(1)/(2)n`

You know that the value of "m" is:

`m=21`

And the value of "n" is:

`n=12`

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

`(1)/(3)(21)-1-(1)/(2)(12)`

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

`((1)(21))/(3)-1-((1)(12))/(2)=(21)/(3)-1-(12)/(2)=7-1-6`

Now, you must solve the subtraction.

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

`=0`