Bonjour !
Ex 43 :
a)
[tex]7x - 6 = 4 - 3x \\ 10x = 10 \\ x = 1[/tex]
b)
[tex]12 - a = 18 - 3a \\ 2a + 12 = 18 \\2a = 6 \\ a = 3[/tex]
Ex 44 :
a)
[tex] - t - 4 = 8 + 7t \\ - 8t = 12 \\ t = - \frac{12}{8} = - 1.5[/tex]
b)
[tex]13x + 11 = 8x + 28 \\ 5x + 11 = 28 \\ 5x = 17 \\ x = \frac{17}{5} = 3.4[/tex]
Ex 45 :
a)
[tex]5x = 0 \\ x = 0[/tex]
b)
[tex]7y + 22 = 14 - 4y \\ 11y + 22 = 14 \\ 11y = - 8 \\ y = - \frac{8}{11} [/tex]
Bonne soirée
