[tex]2)\\4-2(x-1)=10\\\\-2(x-1)=10-4\\\\-2(x-1)=6\ \ \ |:(-2)\\\\x-1=-3\\\\x=-3+1\\\\x=-2[/tex]
[tex]3)\\\frac{3x+15}{9}=x-1\ \ \ |\cdot9\\\\3x+15=9x-9\\\\3x-9x=-9-15\\\\-6x=-24\ \ \ |:(-8)\\\\x=4[/tex]
