Bonjour,
44)
a. - t - 4 = 8 + 7t
- t - 7t = 8 + 4
- 8t = 12
t = - 12/8
t = - 3/2
b. 13x + 11 = 8x + 28
13x - 8x = 28 - 11
5x = 17
x = 17/5
45)
a. 5x = 0
x = 0
b. 7y + 22 = 14 - 4y
7y + 4y = 14 - 22
11y = - 8
y = - 8/11.