resoudre les equation ci dessous 10x-5=30 4x+19=100-5x 3(x-2)=-4(7-x)

[tex]10x-5=30 \\ 10x = 5 + 30 \\ 10x = 35 \\ x = 35/10 \\ x = 3,5 \\ \\ 4x+19=100-5x \\ 4x + 5x = -19 + 100 \\ 9x = 81 \\ x = 81/9 \\ x = 9 \\ \\ 3(x-2)=-4(7-x)\\ 3x - 6 =-28 + 4x \\ 3x - 4x = +6 - 28 \\ - x = - 22\\ 22 = x[/tex]