Sign Up!
Login
Welcome to Test-paper.info
Monday, December 11 2017 @ 03:04 PM CST
 Forum Index >  Test Paper Related >  Primary 6 Matters
 P6 Fraction & Percentage
   |  Printable Version
By: Tping (offline)  Saturday, August 24 2013 @ 06:56 AM CDT (Read 526 times)  
Tping

Hi, please help..

1)
4/5 of Barry's stamps was 93 more than 30% of Brain's stamps.
After Barry used 0.7 of his stamps and Brain used 90% of his stamps,
Barry had 36 stamps more than Brian.
How many stamps did Brian have at first?

Thank you in advance.

Forum Junior
Junior

Registered: 01/26/12
Posts: 25

Profile Email    
   
By: echeewh (offline)  Saturday, August 24 2013 @ 07:33 AM CDT  
echeewh

Hello <Tping>,

Following is my worked solution:

Let Barry be Y and Brian be N

<before>
(4/5)Y - (3/10)N = 93 -- (1)

<process>
Y: -0.7Y = -(7/10)Y
N: -90%N = -(9/10)N

<after>
(3/10)Y - (1/10)N = 36 -- (2)

Using <Simultaneous> method, eliminate Y from (1),(2):

(1)x3:
(12/5)Y - (9/10)N = 279 -- (3)

(2)x8:
(24/10)Y - (8/10)N = 288 -- (4)

(4)-(3):
(9/10)N - (8/10)N = 9
(1/10)N = 9
N = 90

========

Trust this helps.

Do let me know again if this is different from your <Answerkey> or if there's further clarifications.

Cheers,
Edward

Forum Active Member
Active Member

Registered: 04/21/11
Posts: 627

Profile Email    
   


 All times are CST. The time is now 03:04 pm.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content