Réponse:
Okay, voici les réponses
a. x = 0.4
b. a = 2/3
c. x = 1,5
d. t = -8/17
Explications étape par étape:
a. (9/2)x - 1 = 2 - 3x
4,5x - 1 + 1 = 2 + 1 - 3x
4,5x = 3 - 3x
4,5x + 3x = 3 - 3x + 3x
7,5x = 3
7,5x / 7,5 = 3 / 7,5
x = 0.4
b. 2a - 1/3 = 1
2a - 1/3 + 1/3 = 1 + 1/3
2a = 3/3 + 1/3
2a = 4/3
2a / 2 = 4/3 / 2
a = 2/3
c. 5x - 6 = -x + 3
5x - 6 + 6 = -x + 3 + 6
5x = -x + 9
5x + x = -x + x + 9
6x = 9
6x / 6 = 9 / 6
x = 1,5
d. 3(4+3t) = 4(-2t + 1)
12 + 9t = -8t + 4
9t = -8t - 8
17t = -8
t = -8 / 17
