Bonjoir je n arrive pas à résoudre ces equations Exercice 01 : Résous les équations suivantes (6 p a. 5x + 5 = 45 b. 4- 7x = 25 C. 3x + 7x=20 D. 5x/3=2 E.6x+12=
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Question
Bonjoir je n arrive pas à résoudre ces equations
Exercice 01 : Résous les équations suivantes (6 p
a. 5x + 5 = 45
b. 4- 7x = 25
C. 3x + 7x=20
D. 5x/3=2
E.6x+12=3
F.4x+2=3x+4
g. 6x - 8 =5-2x
h.7_8x = 3 + 2x
I. 5(x+3)=3x+7
j. 2(x-7)= 3(x + 1)
k. 10(x + 4) + 7(2x - 3) = 7
1. 7(6 - 2x), 3(4x + 1) = 0
Merci
Exercice 01 : Résous les équations suivantes (6 p
a. 5x + 5 = 45
b. 4- 7x = 25
C. 3x + 7x=20
D. 5x/3=2
E.6x+12=3
F.4x+2=3x+4
g. 6x - 8 =5-2x
h.7_8x = 3 + 2x
I. 5(x+3)=3x+7
j. 2(x-7)= 3(x + 1)
k. 10(x + 4) + 7(2x - 3) = 7
1. 7(6 - 2x), 3(4x + 1) = 0
Merci
1 Réponse
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1. Réponse maudmarine
Bonjour,
a. 5x + 5 = 45
5x = 45 - 5
5x = 40
x = 40/5
x = 8
b. 4 - 7x = 25
- 7x = 25 - 4
- 7x = 21
x = - 21/7
x = - 3
c. 3x + 7x = 20
10x = 20
x = 20/10
x = 2
d. 5x/3 = 2
5x = 6
x = 6/5
e. 6x + 12 = 3
6x = 3 - 12
6x = - 9
x = - 9/6
x = - 3/2
f. 4x + 12 = 3x + 4
4x - 3x = 4 - 12
x = - 8
g. 6x - 8 = 5 - 2x
6x + 2x = 5 + 8
8x = 13
x = 13/8
h. 7 - 8x = 3 + 2x
- 8x - 2x = 3 - 7
- 10x = - 4
x = 4/10
x = 2/5
i. 5 (x + 3) = 3x + 7
5x + 15 = 3x + 7
5x - 3x = 7 - 15
2x = - 8
x = - 8/2
x = - 4
k. 10 (x + 4) + 7 (2x - 3) = 7
10x + 40 + 14x - 21 = 7
10x + 14x = 7 - 40 + 21
24x = - 12
x = 12/24
x = 1/2
1. 7 (6 - 2x) - 3 (4x + 1) = 0
42 - 14x - 12x - 3 = 0
- 14x - 12x = 3 - 42
- 26x = - 39
x = 39/26