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Sagot :

Salut,

1 er cas >

15*1-3*2 = 15-6 = 9

(1+2)/4 = 3/4

2 ème cas >

15*0.5-3*1.5 = 3

(1.5+0.5)/4 = 2/4 = 1/2 =0.5

3ème cas >

15*3-3*15 = 0

(15+3)/4 = 18/4 = 4.5

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