Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**robobudge****Member**- Registered: 2014-04-23
- Posts: 6

Hello,

This is in regards to Question 7 at the bottom of the Equations & Formulas subsection found under The Basics in the Algebra section of the Math is Fun website. I cannot post the link, just tried. If you scroll at the bottom of that subsection, you will find the question.

This is what I did, using the reciprocal instead:

C *9/5=5/9(F-32) *9/5

9/5C=F-32

F=9/5C+32

I got the correct answer, however, you can see I did it different from what the moderator did. I was wondering if it's ok and mostly, if it will cause me problems in more complex equations.

Thank you for your help!

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 93,776

Hi;

I could not find the page so I guess you start with this

and did this,

C *9/5=5/9(F-32) *9/5

correct

9/5C=F-32

correct

F=9/5C+32

correct!

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**robobudge****Member**- Registered: 2014-04-23
- Posts: 6

Thanks! This is how the moderator did it and it confused me because it seemed to make it more complicated than just using the reciprocal:

C=5/9(F-32)

C*9=5/9(F-32)*9

9C=5(F-32)

9C=5F-160

5F=9C+160

5f/5=9C/5 + 160/5

F=9/5C+32

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 93,776

Hi robobudge;

His way is okay too. He did a few extra steps that is true.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline

**robobudge****Member**- Registered: 2014-04-23
- Posts: 6

Thank you for your response bobbym.

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 93,776

You are welcome and hope to see you doing more.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

Offline