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Anonymous
Exactly 5 times because 60/12 = 5
4=4(3s) 4=12s s= 1/3
The simplified expression is 40 - 12s
9s+6s-12s=24... Ignore the 's' for a moment giving the sum 9+6-12=24 - This results in the answer 3 x 'something' = 24. Therefore s=8 !
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