Bonjour
2x + 10 = 24
2x = 24 - 10
2x = 14
x = 14/2
x = 7
4,3x + 8,7 = 17,3
4,3x = 17,3 - 8,7
4,3x = 8,6
x = 8,6/4,3
x = 2
- 5 = 7 + 2t
2t = - 5 - 7
2t = - 12
t = - 12/2
t = - 6
20 * 0,1 * x + 20 = 180
2x + 20 = 180
2x = 180 - 20
2x = 160
x = 160/2
x = 80
(7 * b) / 2 = 28
7b/2 = 28
7b = 56
b = 56/7
b = 8.