
By: geniuskids (offline) Friday, March 01 2013 @ 07:22 AM CST (Read 1138 times)



geniuskids 
Hi there, pls help solve this questions:
Q10. Mrs Song has some money to buy apples and pears. If she buys 5 apples and 2 pears, she will have $2.05 left. If she buys 2 apples and 7 pears instead, she will need another $2.30. If an apple costs $0.55, how much money does Mrs Song have?
Answers:$7.20
Thanks

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Registered: 11/12/11 Posts: 169





By: echeewh (offline) Friday, March 01 2013 @ 05:19 PM CST



echeewh 
hey there
Following pls find my worked solution:
<5A + 2P>
< 205 >
< 230 >
< 2A + 7P >
Using <Gap & Difference> method, we have ...
2A + 7P  (5A + 2P) = 205 + 230
2A + 7P  5A  2P = 435
5P  3A = 435
Given that 1A = 55 cents, we have ...
5P  (3 × 55) = 435
5P  165 = 435
5P = 435 + 165 = 600
1P = 600 ÷ 5 = 120
Amt of money = (5A + 2P) + 205
= (5 × 55) + (2 × 120) + 205
= 275 + 240 + 205
= 720
Mrs Song has $7.20 at first.
==============
Trust this helps.
Do let me know again if there's further clarification.
Cheers,
Edward

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Registered: 04/21/11 Posts: 627





By: geniuskids (offline) Friday, March 01 2013 @ 08:09 PM CST



geniuskids 

Active Member
Registered: 11/12/11 Posts: 169



