Respuesta :

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16. s=numbers of shoes; 10 + s

17. d=dinner cost; d-5

18. r=ringtones; 2r+3

19.g=games; 3g+52; 3(4)+52=64

20. m=medium drinks; 4m+12.75; 4(3)+12.75=24.75.

21. s=songs; 2s+17; 2(5)+17=27.

22. p=purses; 1/2p+3; 1/2(12)+3=9.

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