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corinnemaison
@corinnemaison
January 2021
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bonjour a tous pourriez vous m aider j 'ai un DM a rendre pour jeudi sur les equations merci d'avance
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maudmarine
Verified answer
Bonjour
1)
5x = 20
x = 20/5
x = 4
2)
- 16x = - 4
x = 4/16
x = 1/4
3)
2x - 8 = 0
2x = 8
x = 8/2
x = 4
4)
6x + 7 = 2x - 5
6x - 2x = - 5 - 7
4x = - 12
x = -12/4
x = - 3
5)
- 0,5x - 1,5 = 2,5x - 4,5
- 0,5x - 2,5x = - 4,5 + 1,5
- 3x = - 3
x = 3/3
x = 1
6)
3 (5 - 8x) + 10 = 25x + 18
15 - 24x + 10 = 25x + 18
- 24x - 25x = 18 - 15 - 10
- 49x = 7
x = - 7/49
x = - 1/7
7)
4,2x - (- 1,6x + 3,1) = 6x - 3
4,2x + 1,6x - 3,1 = 6x - 3
4,2x + 1,6x - 6x = - 3 + 3,1
- 0,2x = - 0,1
x = 0,1/0,2
x = 0,5
8)
x/4 + 5/3 = 2
3x/12 + 20/12 = 24/12
3x = 24 - 20
3x = 4
x = 4/3
1 votes
Thanks 1
corinnemaison
je te remercie enormement grace a toi j aurais une bonne note merci bonne journee
maudmarine
J espère :)
nini999
Verified answer
Bonjour :
Rappelle :
(-) × (-) = (+) ---> (-)² = (+)
(-) × (+) =(-)
1)
5x = 20
x = 20/5
x = 4
C'est ton tour fait 2 et attention de changement les signes (Voir le rappelle)
3)
2x - 8 = 0
2x = 8
x = 8/2
x = 4
4)
6x + 7 = 2x - 5
6x - 2x = -5 - 7
4x = -12
x = -12/4
x = -3
C'est ton tour fait 5
6)
3(5 - 8x) + 10 = 25x + 18
15 - 24x + 10 = 25x + 18
15 + 10 - 24x = 25x + 18
25 - 24x = 25x + 18
-24x - 25x = 18 - 25
-49x = -7
x = -7/-49
x = 7/49
x = 1/7
C'est ton tour fait 7
8)
x/4 + 5/3 = 2
x/4 = 2 - 5/3
x/4 = 6/3 - 5/3
x/4 = 1/3
x = 1×4/3
x = 4/3
J’espère t'avoir t'aider
1 votes
Thanks 0
corinnemaison
oui merci beaucoup de ton aide bonne journee
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bj a tous j'ai un dm a rendre pour jeudi pourriez vous m 'aider s'il vous plait
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Lista de comentários
Verified answer
Bonjour1)
5x = 20
x = 20/5
x = 4
2)
- 16x = - 4
x = 4/16
x = 1/4
3)
2x - 8 = 0
2x = 8
x = 8/2
x = 4
4)
6x + 7 = 2x - 5
6x - 2x = - 5 - 7
4x = - 12
x = -12/4
x = - 3
5)
- 0,5x - 1,5 = 2,5x - 4,5
- 0,5x - 2,5x = - 4,5 + 1,5
- 3x = - 3
x = 3/3
x = 1
6)
3 (5 - 8x) + 10 = 25x + 18
15 - 24x + 10 = 25x + 18
- 24x - 25x = 18 - 15 - 10
- 49x = 7
x = - 7/49
x = - 1/7
7)
4,2x - (- 1,6x + 3,1) = 6x - 3
4,2x + 1,6x - 3,1 = 6x - 3
4,2x + 1,6x - 6x = - 3 + 3,1
- 0,2x = - 0,1
x = 0,1/0,2
x = 0,5
8)
x/4 + 5/3 = 2
3x/12 + 20/12 = 24/12
3x = 24 - 20
3x = 4
x = 4/3
Verified answer
Bonjour :Rappelle :
(-) × (-) = (+) ---> (-)² = (+)
(-) × (+) =(-)
1)
5x = 20
x = 20/5
x = 4
C'est ton tour fait 2 et attention de changement les signes (Voir le rappelle)
3)
2x - 8 = 0
2x = 8
x = 8/2
x = 4
4)
6x + 7 = 2x - 5
6x - 2x = -5 - 7
4x = -12
x = -12/4
x = -3
C'est ton tour fait 5
6)
3(5 - 8x) + 10 = 25x + 18
15 - 24x + 10 = 25x + 18
15 + 10 - 24x = 25x + 18
25 - 24x = 25x + 18
-24x - 25x = 18 - 25
-49x = -7
x = -7/-49
x = 7/49
x = 1/7
C'est ton tour fait 7
8)
x/4 + 5/3 = 2
x/4 = 2 - 5/3
x/4 = 6/3 - 5/3
x/4 = 1/3
x = 1×4/3
x = 4/3
J’espère t'avoir t'aider