WiFi's answer to Yeo's Primary 6 Maths Singapore question.
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Let original total number of students be N,
71N - 4(68) = 73 (N-4)
71N - 272 = 73N - 292
71N = 73N - 20
2N = 20
N = 10
71N - 4(68) = 73 (N-4)
71N - 272 = 73N - 292
71N = 73N - 20
2N = 20
N = 10
Date Posted:
4 years ago
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