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primary 5 | Maths
| Whole Numbers
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A+C = 20
B-C = 36 - 20 = 16
B = C + 16
A = 20 - C
6A+B+3C
= 120 - 6C + C + 16 + 3C
= 136 - 2C = 124
C = (136-124) ÷ 2 = 6 kg ( Ans)
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