Dm de MATHS sur les équations Niveau 4 ème
Il faut que je détaille tous les calculs !!

Exercice 1:

A) 2 + 3x = 7-3x
B) 5,1 - x = -8x + 1,7
C) 7x - (5x + 3 )= 5(x-3) +2
D) 7(n+2) -3 = 25 - (3n + 4 )

Exercice 2 : Avec des fractions

A) x- 5/8 = 3/12
B) x- 12/25 = - 11/15
C) -3x/7 = 7/8
D) -11/9x = -1/5
E) 2x/7 + 3/14 = x/7 - 1/14
F) 2/5x - 1/9 = 3/9x + 4/5
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