Bonjour, est-ce que quelqu’un aurait l’amabilité de m’aider à résoudre les exercices 9 et 11 ?
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Merci d’avance !
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Merci d’avance !
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Bonjour,
Exercice 9
a• -2 + x = 5 => x = 5 + 2 => x = 7
b• x + 9 = 16 => x = 16 - 9 => x = 7
c• 6x = 15 => x = 15/6 = 5/2
d• -5x = 24 => x = -24/5
e• 4x + 3x = 49 => 7x = 49 => x = 49/7 = 7
f• -2x + 7x = 36 => 5x = 36 => x = 36/5
Exercice 11
a• 3/4x = 5 => 3x = 5×4 => x = 20/3
b• 4x - 3 = 11 => 4x = 11 + 3 => x = 14/4 = 7/2
c• 7 - 8x = 56 => -8x = 56 -7 => x = -49/8
d• 6x - 4 = 3x + 14 => 6x - 3x = 14 + 4 => 3x = 18 => x = 18/3 => x = 6
e• 9 - 2x = 11 + 4x => -2x - 4x = 11 - 9 => -6x = 2 => x = -2/6 => x = -1/3