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Answer

Wendy:     Left  2u                 Gave away    2u+8

Zhangyi:    Left u                    Gave away 0.5 (2u+8) = u+4

Total at first   =  120   =  2u+2u+8+u+u+4    –> ……   –> u = 18

Zhanyi at first –> u + u + 4 = 18+18+4 = 40 cupcakes#

0 Replies 0 Likes ✔Accepted Answer

This is a Matrix question. 

  Give   Left    Total
Wendy 2u 2u – 8 4u – 8
Zhangyi 1u  1u – 4 2u – 4
Total      6u – 12  

6u – 12 = 120

6u = 120 + 12 = 132

1u = 132 ÷ 6 = 22

2u = 22 ×2 = 44

44 – 4 = 40

 

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6 units –> 120 – 3 x 4 = 108

2 units –> 108 / 3 = 36

36 + 4 = 40

Zhangyi had 40 cupcakes at first.

 

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