Bonjour, j’ai besoin d’aide pour mon exercice de math a. 2t - 5 = 5t + 1 c. 3t - (1 – t) = 7 b.3-7x = 3x + 2 d. 2(1 - 4t) = t + 3
Mathématiques
leapontier27
Question
Bonjour, j’ai besoin d’aide pour mon exercice de math
a. 2t - 5 = 5t + 1
c. 3t - (1 – t) = 7
b.3-7x = 3x + 2
d. 2(1 - 4t) = t + 3
a. 2t - 5 = 5t + 1
c. 3t - (1 – t) = 7
b.3-7x = 3x + 2
d. 2(1 - 4t) = t + 3
1 Réponse
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1. Réponse maudmarine
Bonjour
a. 2t - 5 = 5t + 1
2t - 5t = 1 + 5
- 3t = 6
t = - 6/3
t = - 2
c. 3t - (1 – t) = 7
3t - 1 + t = 7
3t + t = 7 + 1
4t = 8
t = 8/4
t = 2
b.3-7x = 3x + 2
- 7x - 3x = 2 - 3
- 10x = - 1
x = 1/10
d. 2(1 - 4t) = t + 3
2 - 8t = t + 3
- 8t - t = 3 - 2
- 9t = 1
t = - 1/9.