Répondre :
Réponse :
1) [tex]x = \frac{4}{3}[/tex]
2) [tex]x = 1[/tex]
3) [tex]x = -\frac{15}{14}[/tex]
Explications étape par étape :
1) [tex]5x+2 = 2x+6 \implies 5x - 3x +2 - 6 = 0 \implies 3x - 4 = 0 \implies 3x = 4 \implies x = \frac{4}{3}[/tex]
2) [tex]2(3x+3) = -2(x-7) \implies 2(3x+3)+2(x-7) = 0 \implies 2(3x+3 + x -7) = 0 \implies 2(4x-4) = 0 \implies 8x -8 = 0 \implies 8x = 8 \implies x = 1[/tex]
3) [tex]-3(4x+3)=2x+6\implies-3(4x+3)-2x-6=0\implies-12x-9-2x-6=0\implies-14x-15=0\implies14x=-15\impliesx=-\frac{15}{14}[/tex]