a)
[tex]3+2x=15 \ \ /-3\\\\2x=12 \ \ /:2\\\\\huge\boxed{x=6}[/tex]
b)
[tex]4x-8=4 \ \ /+8\\\\4x=12 \ \ /:4\\\\\huge\boxed{x=3}[/tex]
c)
[tex]2-3x=10 \ \ /-2\\\\-3x=8 \ \ /:(-3)\\\\\huge\boxed{x=-2\frac{2}{3}}[/tex]
d)
[tex]1-2x=17 \ \ /-1\\\\-2x=16 \ \ /:(-2)\\\\\huge\boxed{x=-8}[/tex]
