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Owlinker
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This is a fractional transfer question. 

LCM (left)

3/4 = 15/20

2/5 = 8/20

465 × 2/5 = 186

   Before  transfer   After  
Blue 20u -5u 15u
Red  465 – 20u   186 – 8u
Total 465    

15u / 2 = (186 – 8u) / 1

15u = 372 – 15u

15u + 16u = 372

31u = 372

1u = 372 ÷ 31 = 12

20u = 12 × 20 = 240 (blue)

465 – 240 = 225 (red)

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