1)
[tex]3-10\cdot x=9-4\cdot x\\\\3-10x=9-4x\\\\-10x+4x=9-3\\\\-6x=6 \ \ |:(-6)\\\\\huge\boxed{\boxed{x=-1}}[/tex]
2)
[tex]5-2\cdot x=9-6\cdot x\\\\5-2x=9-6x\\\\-2x+6x=9-5\\\\4x=4 \ \ |:4\\\\\huge\boxed{\boxed{x=1}}[/tex]
3)
[tex]-6+4\cdot x=5\cdot x+4\\\\-6+4x=5x+4\\\\4x-5x=4+6\\\\-x=10 \ \ |:(-1)\\\\\huge\boxed{\boxed{x=-10}}[/tex]
