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Sagot :

7/5 + 8x3/15x2 - 19/2 = 7/5 + 2x4x3/5x3x2 + 19/2 = 7/5 + 4/5 + 19/2 = 11/5 + 19/2 = 11x2/5x2 + 19x5/5x2 = 22/10 + 95/10 = (22+95)/10 = 117/10 = 11,7

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