/sci/ - Science & Math » Thread #13639598

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Anonymous Tue 14 Sep 12:36:11 2021 No.13639598 View Reply Original Report

Quoted By:

Can someone teach a brainless neet how to solve this application question with algebra? I know how to solve when I'm given the total quantity sold but not shit like this

Anonymous

Anonymous Tue 14 Sep 2021 12:49:53 No.13639633 Report

Quoted By: >>13639640 >>13639656

Sure.
Let's call the number of DS games d and the number of wii games w.
From the first sentence, we get this relationship:
$d = 3w.$
Because he spent a total of $700 on all games, and because we know the cost per game type, we have:
$30d + 50w = 700$

Now we can solve by substitution.
$30(3w) + 50w = 700$
$90w + 50w = 700$
$140w = 700$
$w = 5<script type="math/tex"><br />Now that we know he has 5 wii games, we know he has 15 DS games due to the first relationship.$

Anonymous

Anonymous Tue 14 Sep 2021 12:54:03 No.13639640 Report

Quoted By: >>13639645

>>13639633
Thanks a fuck ton anon, this may sound dumb but is there a specific name for questions like this?

Anonymous

Anonymous Tue 14 Sep 2021 12:55:21 No.13639645 Report

Quoted By:

>>13639640
Yeah, they are called systems of equations.
Glad to help!

Anonymous

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Anonymous Tue 14 Sep 2021 12:58:50 No.13639656 Report

Quoted By: >>13639685

>>13639633
I was so fast at this as i was young. I write the lines even with out thinking. Why is life like this?

Anonymous

Anonymous Tue 14 Sep 2021 13:07:01 No.13639685 Report

Quoted By:

>>13639656
I imagine you solved them more often when your were younger.
You may also have been less stressed or had more sleep.

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