Sagot :
7(x+3)=4×2
<=> 7x + 21 = 8
<=> 7x = 8-21
<=> 7x = -13
<=> x = -13/7
3(x-2)=6(x+3)
<=> 3x - 6 = 6x + 18
<=> 3x - 6x = 18 + 6
<=> -3x = 24
<=> x = -8
4(x+7)-3=2(x+2)
<=> 4x + 28 - 3 = 2x + 4
<=> 4x - 2x = 4 - 28 +3
<=> 2x = -21
<=> x = -21/2
Réponse :
Explications étape par étape
Bonsoir
résoudre les équations suivantes
7(x+3)=4×+2
7x + 21 = 4x + 2
7x - 4x = 2 - 21
3x = -19
x = -19/3
3(x-2)=6(x+3)
3x - 6 = 6x + 18
6x - 3x = -6 - 18
3x = -24
x = -24/3
x = -8
4(x+7)-3=2(x+2)
4x + 28 - 3 = 2x + 4
4x - 2x = 4 + 3 - 28
2x = -21
x = -21/2
x = -10,5