bonjour, pouvez vous m’aider a faire l’exercice 6 svp merci ❤️❤️

Bonsoir,

a) 7/9y + 5 = 8
7/9y = 8 - 5
7/9y = 3
7/9y = 27/9
7y = 27
y = 27/7

b) 1/16x - 2 = 5/8
1/16x - 32/16 = 10/16
x = 10 + 32
x = 42

c) 1/4x - 3/8 = 2/3
6/24x - 9/24 = 16/24
6x = 16 + 9
6x = 25
x = 25/6

d) 3/7y - 5/35 = - 8/14
3/7y - 1/7 = - 2/7
3y = - 2 + 1
3y = - 1
y = - 1/3