Réponses

  • Utilisateur Brainly
2012-06-04T15:38:26+02:00

a)(4/5) - x+(4/3 )= 2.(2x-1) /5

(12-15x+20)/15=6(2x-1)/15

32-15x=12x-6

38=27x

x=38/27

b)

(4-4/5) : 1/3= 1/4-1/x


((20-4)/5)(3/1)= (x-4)/4x

48/5= (x-4)/4x

192x=5x-20

187x=-20

x=-20/187