Go to navigation
It is currently Tue Dec 06, 2016 9:50 pm

All times are UTC




Post new topic Reply to topic  [ 6 posts ] 
Author Message
 Post subject: Help Please
PostPosted: Thu Dec 02, 2010 8:00 pm 
Offline

Joined: Wed Sep 08, 2010 1:59 pm
Posts: 8
Hi,

Can someone help please?

1 burger + 2 drinks = £2.80
2 burger + 5 drink = £6.10

find the cost of a burger
Find the cost of a drink.

I did get the answer after so many attempts.. but is there is an easy way to do this?

thanks
meeraa


Top
 Profile  
 
 Post subject: Re: Help Please
PostPosted: Thu Dec 02, 2010 8:15 pm 
Offline

Joined: Fri Sep 15, 2006 8:51 am
Posts: 8113
meeraa wrote:
Hi,

Can someone help please?

1 burger + 2 drinks = £2.80
2 burger + 5 drink = £6.10

find the cost of a burger
Find the cost of a drink.

I did get the answer after so many attempts.. but is there is an easy way to do this?

thanks
meeraa


The way I would do it is to say if 1B+2D = £2.80 then 2B + 4D = £5.60 so the extra D must be 6.10-5.60= 50p. hence 1B=£1.80 ...


Top
 Profile  
 
 Post subject: Re: Help Please
PostPosted: Thu Dec 02, 2010 8:19 pm 
Offline

Joined: Thu Mar 04, 2010 10:41 pm
Posts: 1008
2 burger + 5 drinks = £6.10
-1 burger + 2 drinks = £2.80
= 1 burger + 3 drinks =£3.30

1 drink therefore = 50p
1 burger + (£1) = £2.80,
1 burger = £2.80-£1.00
1 burger = £1.80


Top
 Profile  
 
 Post subject: Re: Help Please
PostPosted: Fri Dec 03, 2010 4:29 pm 
Offline

Joined: Mon Nov 08, 2010 9:15 am
Posts: 42
Location: Birmingham
If 1 burger + 2 drinks is £2.80

then 2 burgers + 4 drinks would be £5.60

therefore if 2 burgers + 5 drinks = £6.10 the extra drink must cost 50p

and then it is easy to work out the rest

_________________
"A teacher affects eternity; he can never tell where his influence stops."
Henry B. Adams


Top
 Profile  
 
 Post subject: Re: Help Please
PostPosted: Fri Dec 03, 2010 5:25 pm 
Offline

Joined: Wed Nov 17, 2010 10:05 am
Posts: 3
For simplicity assume B stands for burger and D stand for drinks:
1) B + 2D = 2.8
2) 2B + 5D = 6.1
***********
Rewrite formula 1 to get B
B = 2.8 -2D
Substitute formula 2 with the B you got above, this will give you:
2(2.8- 2D) + 5D=6.1
get rid of the bracket by multiplying 2
5.6 - 4D+5D=6.1
5.6+D=6.1
D=6.1 -5.6
D=.5 or D=50p
Once you have the value of D, you can insert it either in formula 1 or 2 to find B

B=2.8-2D
B=2.8 - 2(.5)
B=2.8 - 1
B=1.8
B=£1.8 (Put back the currency)


Top
 Profile  
 
 Post subject: Re: Help Please
PostPosted: Tue Dec 07, 2010 12:22 pm 
Offline

Joined: Wed Sep 08, 2010 1:59 pm
Posts: 8
Thank you so much for all the replies....
Now I can see how this can be solved.. (diff ways)..

Thanks again

Meeraa


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
CALL 020 8204 5060
   
Privacy Policy | Refund Policy | Disclaimer | Copyright © 2004 – 2016