Sagot :
Bonjour,
=> Résoudre chaque équation.
a.-2+x=5
x = 5 + 2
x = 7
b.x + 9 = 16
x = 16 - 9
x = 7
C. 6x = 15
x = 15/6
x = 2,5
d. -5x = 24
x = 24/-5
x = -4,8
e. 4x + 3x = 49
7x = 49
x = 49/7
x = 7
f.-2x + 7x = 36
5x = 36
x = 36/5
x = 7,2
Bonne journée, et bonne année ^^
Bonjour,
a) -2 + x = 5
⇔ -2 + x + 2 = 5 + 2
⇔ x = 7
b) x + 9 = 16
⇔ x + 9 - 9 = 16 - 9
⇔ x = 7
c) 6x = 15
⇔ 6x/6 = 15/6
⇔ x = 2.5
d) -5x = 24
⇔ -5x/(-5) = 24/(-5)
⇔ x = -4.8
e) 4x + 3x = 49
⇔ 7x = 49
⇔ 7x/7 = 49/7
⇔ x = 7
f) -2x + 7x = 36
⇔ 5x = 36
⇔ 5x/5 = 36/5
⇔ x = 7.2
En espérant t'avoir aidé.
Bonne année.