November 1st, 2019, 05:46 AM  #1 
Newbie Joined: Nov 2019 From: Finland Posts: 9 Thanks: 0  equation formula
Hi. You guys know how to calculate (formula) these ones? I'm studying by myself, so I don't get any teacher help. (k3) – (53k) = 2(k+1) should it continue like this... (answer is k = 5) k  3  5  3k = 2k + 2 and how about this second one? (answer x = 6) x/2 – (x1)/5 = 2 Last edited by skipjack; November 1st, 2019 at 06:55 AM. 
November 1st, 2019, 06:48 AM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 2,340 Thanks: 983 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
k  3  5 + 3k = 2k + 2 For the second, what's the common denominator? Dan Last edited by skipjack; November 1st, 2019 at 06:56 AM.  
November 6th, 2019, 01:43 AM  #3  
Newbie Joined: Nov 2019 From: Finland Posts: 9 Thanks: 0  Quote:
Second one it's number 10 I guess? How about when reading text and then create your own formula base on that text. "The price of the computer rose by 8% in the spring but fell by 8% in the autumn, after that omputer cost € 794.88. What was the price of the computer at the beginning of that year?" Without having that fell by 8% section formula would be: x + 0,08x = 794,88 1,08 =794,88 x = 736 But when having first going up and then down 8% not sure what kind of formula I should have?  
November 6th, 2019, 03:26 AM  #4  
Math Team Joined: Jul 2011 From: Texas Posts: 3,093 Thanks: 1675  Quote:
$5x2(x1)=20$ take it from here? percentage problem ... $0.92(1.08x)=794.88$  
November 6th, 2019, 04:17 AM  #5  
Newbie Joined: Nov 2019 From: Finland Posts: 9 Thanks: 0  Quote:
5x2 (x1) = 20 5x2x=202 3x=18 x=6  
November 6th, 2019, 04:52 AM  #6 
Newbie Joined: Nov 2019 From: Finland Posts: 9 Thanks: 0 
How about this one? Jack buys MathForum shares for 2000 euros. How many shares will Jack receive if MathForum's share price is €6,50 and the acquisition cost is €8 plus 0,18% of the value of the shares to be purchased? 6,50x  8  0,0018x = 2000 (?) I'm not sure how I should deal with that 0,18%. Last edited by skipjack; November 7th, 2019 at 03:10 AM. 
November 6th, 2019, 06:17 AM  #7 
Senior Member Joined: Jun 2019 From: USA Posts: 376 Thanks: 202 
Not quite, rather it's Cost of shares : 6,50x + Acquisition cost : 8,00 + (0,0018*6,50x) = Money spent : 2000,00 $1,0018 \cdot 6,50 ~€ \cdot x + 8,00 ~€ = 2000,00 ~€$ 
November 7th, 2019, 12:51 AM  #8 
Newbie Joined: Nov 2019 From: Finland Posts: 9 Thanks: 0  
November 7th, 2019, 03:24 AM  #9 
Global Moderator Joined: Dec 2006 Posts: 21,106 Thanks: 2324  
November 7th, 2019, 04:53 AM  #10  
Newbie Joined: Nov 2019 From: Finland Posts: 9 Thanks: 0  Quote:
"Viivi ostaa Outokummon osakkeita 2000 eurolla. Kuinka monta osakketta Viivi saa, jos Outokummon osakkeen kurssi on 6,50 euroa ja ostosta aiheutuu kuluja 8 euroa sekä 0,18% ostettavien osakkeiden arvosta?"  

Tags 
equation, formula 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
How to solve an equation of: (x^4)+px+q=0 (Using PQFormula)  DecoratorFawn82  Algebra  4  May 7th, 2015 10:30 PM 
Help finding an equation/formula for this info  Comicazy  Algebra  7  January 27th, 2012 01:56 PM 
Logical Equation (Find the formula)  restrictment  Applied Math  8  October 12th, 2010 05:45 AM 
I NEED a formula or equation!  AJacobson  Economics  0  June 15th, 2009 03:26 PM 
A formula needed from an equation  soorajth  Applied Math  8  April 15th, 2009 05:54 AM 