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.