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This is a Before After question .

   Before    Transfer   After   
Red     3u + 20 3u + 20
Blue  4u   4u
       

(3u + 20) /2  = 4u / 1

3u + 20 = 8u

20 = 8u – 3u

5u = 20

1u = 20 ÷ 5 = 4

a)

3u = 3× 4 = 12

12 + 20 = 32 red

b)

4u = 4 × 4 = 16 blue

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What does / stands for

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/ means divide

Eg  (2u + 5) / 6   (a fraction )

Means   

2u + 5

————

   5 

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