Bonjour,j'aurais besoin d'aide pour les exercices 43 et 44 merci d'avance

Bonjour,

43/

a.

7x-6=4-3x

10x=10

x=1

b.

12-a=18-3a

2a=6

a=3


44/

a.

-t-4=8+7t

-8t =12

t=-12/8

t=-3/2

b.

13x+11=8x+28

5x=17

x=17/5

bon courage !

Exercice 43
7x -6 = 4 -3x
7x +x = +6 +4
8x = 10 
x= 10/8 = 5/4

12 - a = 18 -3a
-a +3a = -12 +18
2a = +4
a= 4/2 = 2

Exercice 44
-t -4 = 8 +7t
-t -7t = +4 +8
-8t = 12
t = -12/8 = -6/4 = -3/2 

13x +11 = 8x +28
13x -8x = -11 +28
5x = 17
x = 17/5