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 February 14th, 2017, 11:37 AM #1 Newbie   Joined: Feb 2017 From: Paraguay Posts: 1 Thanks: 0 how to simplify this formula? How do you simplify this equation to solve for RPM? 6.089/RPM + 1.98RPM = 14,918 It's part of my new formula for determining peak power RPM by transfer port duration and transfer/boost area. (on a 2 stroke engine) February 14th, 2017, 11:57 AM #2 Senior Member   Joined: May 2016 From: USA Posts: 1,310 Thanks: 552 Multiply by rpm. You will get a quadratic equation. February 14th, 2017, 10:31 PM #3 Member   Joined: Sep 2016 From: India Posts: 88 Thanks: 30 First, make it simple by multiplying each term by $1000$ $\dfrac{6089}{\text{RPM}}\;+\;1980\text{RPM}=14918 000$ Now, multiply each term by RPM $6089\;+\;1980\text{RPM}^2=14918\text{RPM}$ $1980\text{RPM}^2-14918\text{RPM}+6089=0$ We can observe that it's a quadratic equation So, solve it using quadratic formula, i.e., $x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$ February 15th, 2017, 03:53 AM   #4
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 Originally Posted by deesuwalka First, make it simple by multiplying each term by $1000$ $\dfrac{6089}{\text{RPM}}\;+\;1980\text{RPM}=14918 000$ Now, multiply each term by RPM $6089\;+\;1980\text{RPM}^2=\color{red}{14918000RPM }$
$\color{red}{correction}$ February 15th, 2017, 07:40 AM   #5
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 Originally Posted by jaguar57 6.089/RPM + 1.98RPM = 14,918
x = RPM; rewrite after multiplication by 1000:
6089/x + 1980x = 14918000 Tags formula, simplify Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Apple30 Algebra 4 October 13th, 2014 06:31 AM Shamieh Algebra 2 September 12th, 2013 07:05 AM markmain Algebra 1 January 6th, 2011 12:28 AM agro Probability and Statistics 3 August 27th, 2009 07:17 AM Ghoti Algebra 1 July 19th, 2008 12:13 AM

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