Han's answer to Srikanth's Primary 6 Maths Data Analysis Singapore question.
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let x be the number of puffs bought by kai ling
the equation is then: X * 0.8 = ((X + 5) * 0.6) + 1.2
0.8X = 0.6X + 3 + 1.2
0.2X = 4.2
X = 21
Kai Ling spent 21 x 0.8 = $16.8 on 21 pieces of curry puffs
to check back, faizal bought (21+5) x 0.6 = $15.6 on 26 pieces of curry puffs
the equation is then: X * 0.8 = ((X + 5) * 0.6) + 1.2
0.8X = 0.6X + 3 + 1.2
0.2X = 4.2
X = 21
Kai Ling spent 21 x 0.8 = $16.8 on 21 pieces of curry puffs
to check back, faizal bought (21+5) x 0.6 = $15.6 on 26 pieces of curry puffs
Date Posted:
3 years ago
Thanks. Clear explination. Thanks
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