Résoudre les équations suivantes: A) -6a + 10 = -26 B) -12 - 5b = - 32 C) 15c - 74 = 76 D) 120 - 8d = 20

A) -6a + 10 = -26
- 6a = - 26 - 10
- 6a = - 36
6a = 36
a = 36/6
a = 6

B) -12 - 5b = - 32
- 5b = - 32 + 12
- 5b = - 20
5b = 20
b = 20/5
b = 4

C) 15c - 74 = 76
15c = 76 + 74
15c = 150
c = 150/15
c = 10

D) 120 - 8d = 20
- 8d = 20 - 120
- 8d = - 100
8d = 100
d = 100/8
d = 12,5

Résoudre les équations
-6a +10 = -26
-6a = -10 -26
-6a = -36
a = +36/6
a = 6

-12 -5b = -32
-5b = +12 -32
-5b = -20
b = +20/5
b = 4

15c -74 = 76
15c = 74 +76
15c = 150
c = 150/15
c = 10

120 -8d = 20
-8d = -120 +20
-8d = -100
d = +100/8
d = 50/4 = 25/2