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shindalisa2009
@shindalisa2009
April 2023
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Pouvez m 'aider à faire ces exercices comme l'exemple:
Exemple:
5x - 4 = 3x + 2
donc 5x - 4 - (3x +2) = 0
donc 5x - 4- 3x - 2 =0
donc 2x - 6 = 0
donc 2x = 6
donc 2 * x = 6
donc x = 6/2
donc x = 3
exercice 43 :
a) 7x - 6 = 4 - 3x
b) 12 - a = 18 - 3a
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julianechatard
a) 7x - 6 = 4 - 3x
7x - 6 - (4 - 3x) = 0
7x - 6 - 4 + 3x = 0
10x - 10 = 0
10x = 10
10 * x = 10
x = 10/10
x = 1
b) 12 - a = 18 - 3a
12 - a - (18 - 3a) = 0
12 - a - 18 + 3a = 0
2a -6 = 0
2a = 6
2 * a = 6
x = 6/2
x = 3
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7x - 6 - (4 - 3x) = 0
7x - 6 - 4 + 3x = 0
10x - 10 = 0
10x = 10
10 * x = 10
x = 10/10
x = 1
b) 12 - a = 18 - 3a
12 - a - (18 - 3a) = 0
12 - a - 18 + 3a = 0
2a -6 = 0
2a = 6
2 * a = 6
x = 6/2
x = 3