Bonjour,
36)
A = 7x - 14
A = 7 (x - 2)
B = 18 + 6y
B = 6 (3 + y)
C = 4z - 28
C = 4 (z - 7)
D = 2,1 + 0,3t
D = 0,3 (7 + t)
37)
A = 5 (3 + x) = 5 * x + 3 * x = 15 + 5x
B = 7 (y - 4) = 7 * y - 7 * - 4 = 7y - 28
C = 6 (11 + 2a) = 6 * 11 + 2 * a = 66 + 2a
D = 3 (3z - 4) = 3 * 3z - 3 * 4 = 9z - 12