Respuesta :

I think the answer is C. 
faizu
8 + 4s - 2s = 16
=> 8 + 2s = 16 
=> 2s = 16 - 8
=> 2s = 8
=> s = 8/2
=> s = 4 ..

so the correct option is "C. s=4"

Hope it helps !!!
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