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Roro90
@Roro90
May 2019
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Pouvez vous m'aidee svp je suis nul en math
Ex23 Résoudre les équations suivantes :
1) 2х+1= 7
2) 3х+2= −4
3) 5х−2= 8
4) 4х−5= −2
5) 3–2х= 5
6) 4−3х= –7
7) −5−2х= −9
8) −6−4х= 10
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taalbabachir
Verified answer
1) 2 x + 1 = 7 ⇒ 2 x = 7 - 1 = 6 ⇒ x = 6/2 = 3
2) 3 x + 2 = - 4 ⇒ 3 x = - 4 - 2 = - 6 ⇒ x = - 6/3 = - 2
3) 5 x - 2 = 8 ⇒ 5 x = 8 + 2 = 10 ⇒ x = 10/5 = 2
4) 4 x - 5 = - 2 ⇒ 4 x = - 2 + 5 = 3 ⇒ x = 3/4
5) 3 - 2 x = 5 ⇒ 2 x = 3 - 5 = - 2 ⇒ x = - 2/2 = - 1
6) 4 - 3 x = - 7 ⇒ 3 x = 4 + 7 = 11 ⇒ x = 11/3
7) - 5 - 2 x = - 9 ⇒ 2 x = - 5 + 9 = 4 ⇒ x = 4/2 = 2
8) - 6 - 4 x = 10 ⇒ 4 x = - 6 - 10 = - 16 ⇒ x = - 16/4 = - 4
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Bonjour pouvez vous m aidee svp \frac{5}{7} (a+3)=-4
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Verified answer
1) 2 x + 1 = 7 ⇒ 2 x = 7 - 1 = 6 ⇒ x = 6/2 = 32) 3 x + 2 = - 4 ⇒ 3 x = - 4 - 2 = - 6 ⇒ x = - 6/3 = - 2
3) 5 x - 2 = 8 ⇒ 5 x = 8 + 2 = 10 ⇒ x = 10/5 = 2
4) 4 x - 5 = - 2 ⇒ 4 x = - 2 + 5 = 3 ⇒ x = 3/4
5) 3 - 2 x = 5 ⇒ 2 x = 3 - 5 = - 2 ⇒ x = - 2/2 = - 1
6) 4 - 3 x = - 7 ⇒ 3 x = 4 + 7 = 11 ⇒ x = 11/3
7) - 5 - 2 x = - 9 ⇒ 2 x = - 5 + 9 = 4 ⇒ x = 4/2 = 2
8) - 6 - 4 x = 10 ⇒ 4 x = - 6 - 10 = - 16 ⇒ x = - 16/4 = - 4