besoin d'aide svp pour cest deux exercices.
Mathématiques
doscaroline
Question
besoin d'aide svp pour cest deux exercices.
2 Réponse
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1. Réponse aminerbt
Exercice 12
a/
3x = 13 - 7
3x = 6
x = 6/3
x = 2
b/
7x = 4 +10
7x = 14
x=14/7
x=2
Exercice 13
a/
2x = 7 + 9
2x = 16
x = 16/ 2
x = 8
b/
2 -13 = 6x
-11 =6x
x = -11/6 -
2. Réponse serigne21
12) a. 3X +7 = 13 b. 7X - 10 = 4
3X = 13 -7 7X = 4 + 10
3X = 6 7X = 14
X = 6/3 X = 14/7
X = 2 X = 2
s = { 2} S = { 2}
13)
a. 2X - 9 = 7 b. 2 = 6X + 13
2X = 7 + 9 2 - 13 = 6X
2X = 16 -11 = 6X
X = 16/2 X = -11/6
X = 8 S = { -11/6}
S = { 8}