Sagot :
Bonjour,
-3 + x = 7 ⇒ x = 7 + 3 = 10
x + 8 = 11 ⇒ x = 11 - 8 = 3
5x = 19 ⇒ x = 19/5
-2x = 9 ⇒ x = -9/2
3x + 7x = 50 ⇒ 10x = 50 ⇒x = 50/10 = 5
-4x + 9x = 45 ⇒ 5x = 45 ⇒ x = 45/5 = 9
Bonsoir,
Résoudre les équations:
a) -3 + x = 7
x= 7+3
x= 10
b) 5x = 19
x= 19/5
c) 3x + 7x = 50
10x= 50
x= 50/10
x= 5
d) x + 8 = 11
x= 11-8
x= 3
e) -2x = 9
x= -9/2
f) -4x + 9x = 45
5x= 45
x= 9