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 Post subject: Help please, cannot thinkPosted: Mon Sep 01, 2014 10:06 am

Joined: Sat Jun 15, 2013 9:03 pm
Posts: 54
A comic cost20p less than a book. If 4books and 7comics cost £2.23, what is the cost of 1comic.

REALLY THANKFUL
Sutu

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 Post subject: Re: Help please, cannot thinkPosted: Mon Sep 01, 2014 10:18 am

Joined: Wed Mar 20, 2013 1:16 pm
Posts: 64
If the cost of the Book is B, cost of Comic is B - 20

Cost of 4 books = 4B
So cost 7 comics is 7B -140
Total cost = 223 (Given)

Based on the above it works out that B = 33p and Comic = 13p

Hope that helps

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 Post subject: Re: Help please, cannot thinkPosted: Mon Sep 01, 2014 10:20 am

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11938
You do NOT need to use algebra for this type of problem.

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 Post subject: Re: Help please, cannot thinkPosted: Mon Sep 01, 2014 10:37 am

Joined: Wed Dec 14, 2011 9:54 am
Posts: 211
Each Book cost 20p More than a comic

Hence, The cost of 4 books will be 80p more that the cost of 4 comics

So

7 comics and 4 books cost 223 pence which is also the same as

7 comics and 4 comics + 80p = 223 pence

11 comics + 80p = 223 pence

11 comics = 143p

1 comic = 13p

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 Post subject: Re: Help please, cannot thinkPosted: Mon Sep 01, 2014 11:47 am

Joined: Sat Jun 15, 2013 9:03 pm
Posts: 54
OH that makes lots of sense. Thank you all.

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 Post subject: Re: Help please, cannot thinkPosted: Mon Sep 01, 2014 12:06 pm

Joined: Fri Oct 12, 2007 12:42 pm
Posts: 3813
Very cheap books and comics.

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