Gd evening. Need help for my boy for this question. Tq.
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Again this question is a bit mixed up…first shop then basket and then shop. Also, they have already switched the ratio to trick the kids, that should be enough confusion in one question.
Red Apples Green Apples
Before 7u 9u
Eating -27 Purchasing +27
After p 3p
(a) p = 7u-27
3p = 9u+27 = 3(7u-27) =21u-81
21u-9u = 27+81 = 108 =>12u=108
u = 108/12 = 9 => p =7(9)-27 = 36
Green apples in the end (in the basket?) are 3p = 3 x36 = 108
(b) Since red apples = p = 36,
Red apples to purchase to equal green apples = 108-36 = 72