bonjour pouriez vous maider pour les equation a resoudre 12+x=5-13x 7x-8=3x+2 5(x-2)+2(1-3)=7x+12 meeeeeeeeerrrrrrrrrcccccccccciiiiiiiii

bonjour,

12 + x = 5 - 13 x

x + 13 x = 5 - 12

14 x = - 7

x = - 1/2

7 x - 8 = 3 x + 2

7 x - 3 x = 2 +  8

4 x = 10

x = 5/2

5 x - 10 + 2 - 6 = 7 x + 12

5 x - 7 x = 12 + 10 - 2

- 2 x = 20

x = - 10