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Cassou123456
@Cassou123456
May 2019
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Cc ses pour savoir si vous pouvez m'aider pour 3 exercice s'il vous plaît :
Le premier ses : 2×+8=7 4-8×=15 5×+11=3×+5 4×-3=-2×+8
le deuxième ses : l'exercice 31 (en photo)
la troisième ses : l'exercice 33
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maudmarine
Verified answer
Bonsoir,
2×+8=7
2x = 7 - 8
2x = - 1
x = - 1/2
4-8×=15
- 8x = 15 - 4
- 8x = 11
x = - 11/8
5×+11=3×+5
5x - 3x = 5 - 11
2x = - 6
x = - 6/2
x = - 3
4×-3=-2×+8
4x + 2x = 8 + 3
6x = 11
x = 11/6
31) Il n'y est pas
33)
1) 4 (x - 5) =
4x - 20
6 (- x + 2) =
- 6x + 12
2) 4 (x - 5) = 6 (- x + 2)
4x - 20 = - 6x + 12
4x + 6x = 12 + 20
10x = 32
x = 32/10
x = 16/5
0 votes
Thanks 1
Cassou123456
merci ✌️
Commentaires
Verified answer
2x+8=7 ⇒ 2x=7-8 ⇒ 2x=-1 ⇒ x=-1/2
4-8x=15 ⇒ -8x=15-4 ⇒ -8x=11 ⇒ x=-11/8
5x+11= 3x+5 ⇒ 5x-3x=5-11 ⇒ 2x=-6 ⇒ x=-6/2 = -3
4x-3=-2x+8 ⇒ 4x+2x = 8+3 ⇒ 6x=11 ⇒ x=11/6
Ex. 33 :
1) 4(x-5) = 4x-20
6(-x+2) = -6x+12
2) 4(x-5) = 6(-x+2)
⇒ 4x-20 = -6x+12
⇒ 4x+6x = 12+20
⇒ 10x = 32
⇒ x = 32/10 = 16/5
1 votes
Thanks 1
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Verified answer
Bonsoir,2×+8=7
2x = 7 - 8
2x = - 1
x = - 1/2
4-8×=15
- 8x = 15 - 4
- 8x = 11
x = - 11/8
5×+11=3×+5
5x - 3x = 5 - 11
2x = - 6
x = - 6/2
x = - 3
4×-3=-2×+8
4x + 2x = 8 + 3
6x = 11
x = 11/6
31) Il n'y est pas
33)
1) 4 (x - 5) = 4x - 20
6 (- x + 2) = - 6x + 12
2) 4 (x - 5) = 6 (- x + 2)
4x - 20 = - 6x + 12
4x + 6x = 12 + 20
10x = 32
x = 32/10
x = 16/5
Verified answer
2x+8=7 ⇒ 2x=7-8 ⇒ 2x=-1 ⇒ x=-1/24-8x=15 ⇒ -8x=15-4 ⇒ -8x=11 ⇒ x=-11/8
5x+11= 3x+5 ⇒ 5x-3x=5-11 ⇒ 2x=-6 ⇒ x=-6/2 = -3
4x-3=-2x+8 ⇒ 4x+2x = 8+3 ⇒ 6x=11 ⇒ x=11/6
Ex. 33 :
1) 4(x-5) = 4x-20
6(-x+2) = -6x+12
2) 4(x-5) = 6(-x+2)
⇒ 4x-20 = -6x+12
⇒ 4x+6x = 12+20
⇒ 10x = 32
⇒ x = 32/10 = 16/5