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m_a_m_a [10]
3 years ago
5

Miss Lim bought some puzzles for her pupils in the Maths Club. She bought a total

Mathematics
1 answer:
xxMikexx [17]3 years ago
6 0

Answer:

She bought 24 Tangram puzzles

Step-by-step explanation:

Let the number of Tangram puzzles be t and the number of IQ puzzles be i

The sum of all the puzzles is 40;

i + t = 40 ••••••(i)

Cost of all Tangram puzzles at a cost of $4 per one will be;

4 * t = $4t

cost of all Iq puzzles at a cost of $2 per one is

2 * i = $2i

Sum

paid for all is $128

so;

4t + 2i = 128 •••••••(ii)

From equation i;

i = 40-t

Substitute into ii

4t + 2(40-t) = 128

4t + 80 - 2t = 128

2t = 128-80

2t = 48

t = 48/2

t = 24

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Read 2 more answers
Solve and graph <br> -4 + 2t - 14 - 18t &gt; -6 - 100t
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Okay so first u just add the terms on each side 
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