solve

_k_ = 21

13

k = ______??

I'm stuck...

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- Apr 30th 2008, 03:32 PMmr_payne2003the last problem on my homework page..
solve

_k_ = 21

13

k = ______??

I'm stuck... - Apr 30th 2008, 03:36 PMo_O
Multiply both sides by 13 and notice how it cancels with the 13 under the division sign ...

$\displaystyle \frac{k}{13} {\color{blue} \times 13} = 21 {\color{blue} \times 13}$

$\displaystyle k = 21 \times {\color{blue} 13}$ - Apr 30th 2008, 03:39 PMmr_payne2003
So k= 273. Right

- Apr 30th 2008, 03:45 PMo_O
Well, plug it in to your original equation. Does:

$\displaystyle \frac{273}{13} = 21$

If so, then you have the correct solution.