Explications étape par étape:
x étant la distance totale:
(x×5/8) + (x×1/3 ) + 3 = x
15x/24 + 8x/24 - x = -3
23x/24 - 24x/24 = -x/24 = -3
x = 3x24 = 72km
vérification:
72×5/8 = 5x9 = 45
72×1/3 = 24
45 + 24 + 3 = 72km
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Explications étape par étape:
x étant la distance totale:
(x×5/8) + (x×1/3 ) + 3 = x
15x/24 + 8x/24 - x = -3
23x/24 - 24x/24 = -x/24 = -3
x = 3x24 = 72km
vérification:
72×5/8 = 5x9 = 45
72×1/3 = 24
45 + 24 + 3 = 72km