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Question

P5 (Problem-solving Beyond Classroom)

1.2, Q5)

Sarah and Elena went shopping together with a total of $654. Elena spent 3 times as much as Sarah. They saved the rest of their money. Sarah spent $128 less than what she had saved. In the end, Sarah saved twice as much money as Elena.

A) How much money did Sarah spend

B) How much money did Elena have at first

Answer

1 Reply 0 Likes ✔Accepted Answer

Thank you!

Couldn’t ‘see’ it cos we lumped the spent and saved blocks together. Thank you again!

1 Reply 0 Likes

You are welcome😊

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(a)
Elena spent : 3u
Sarah spent : 1u
Elena saved : 1p
Sarah saved : 2p

4u + 3p ——-> 654
2p ——-> 1u + 128
1u ——-> 2p – 128
4 x (2p – 128) + 3p = 8p – 512 + 3p = 11p – 512 ——-> 654
1p ——-> (654 + 512)/11 = 106
1u ——-> 2 x 106 – 128 = 84

(b)
3u + 1p ——-> 3 x 84 + 106 = 358

Ans : (a) $84; (b) $358.

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