Bonjour aider moi svp. x+19=8 , 7×b-2=40 , 3×c+2=7×c

bonjour
x+19=8
x=8-19
x=-11

7b-2=40
7b=40+2
7b=42
b=42/7=6

3c+2=7c
3c-7c=-2
-4c=-2
c=2/4=1/2=0.5

Bonsoir,

x+19=8
x + 19 - 19 = 8 - 19
x = -11

7×b-2=40
7b - 2 + 2 = 40 + 2
7b = 42
7b/7 = 42/7
b = 6

3×c+2=7×c
3c + 2 = 7c
3c + 2 - 3c = 7c - 3c
2 = 4c
2/4 = 4c/4
c = 1/2