👤

bonjour je suis bloqué exercice 2 urgent svp

Bonjour Je Suis Bloqué Exercice 2 Urgent Svp class=

Répondre :

Bonjour !

3x = 36
x = 36/3
x = 12

4x - 5 = 2x+10
4x = 2x + 15
2x = 15
x = 15/2

5(x+1)-2 = 7x
5x+3 = 7x
-2x = -3
x = 3/2

(10x+7)(-7x+49)=0
-70x^2+441x+343 = 0
x = 7

16x² - 144= 0
16x² = 144
x²= 9
x=3

2(x-3)-5(-x+4)=15
7x-26=15
7x=41
x=41/7