EQUATIONS: (1) 3(a - 5) = 4(3 - 2a) (2) 5 + (6 - 2a) = (5a - 11) - (6 + 3a) (3) 2_3 x = 5_2 (2 sur 3x = 5 sur 2) (4) 5x_3 = 2_5 (5x sur 3 = 2 sur 5)
Mathématiques
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Question
EQUATIONS:
(1) 3(a - 5) = 4(3 - 2a)
(2) 5 + (6 - 2a) = (5a - 11) - (6 + 3a)
(3) 2_3 x = 5_2 (2 sur 3x = 5 sur 2)
(4) 5x_3 = 2_5 (5x sur 3 = 2 sur 5)
(1) 3(a - 5) = 4(3 - 2a)
(2) 5 + (6 - 2a) = (5a - 11) - (6 + 3a)
(3) 2_3 x = 5_2 (2 sur 3x = 5 sur 2)
(4) 5x_3 = 2_5 (5x sur 3 = 2 sur 5)
1 Réponse
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1. Réponse loulakar
Bonsoir,
EQUATIONS:
(1) 3(a - 5) = 4(3 - 2a)
3a - 15 = 12 - 8a
3a + 8a = 12 + 15
11a = 27
a = 27/11
(2) 5 + (6 - 2a) = (5a - 11) - (6 + 3a)
5 + 6 - 2a = 5a - 11 - 6 - 3a
11 + 11 + 6 = 5a - 3a + 2a
28 = 0a
Pas de solution pour a
(3) 2/(3x) = 5/2
3x = 2 * 2 / 5
x = 4/(3 * 5)
x = 4/15
(4) 5x/3 = 2/5
5x = 2 * 3 / 5
x = 6/(5 * 5)
x = 6/25