1)
[tex]3x+5=8\\\\3x=8-5\\\\3x=3 \ \ |:3\\\\\boxed{x=1}[/tex]
2)
[tex]2(x+2)=7 \ \ |:2\\\\x+2=3,5\\\\x=3,5-2\\\\\boxed{x=1,5}[/tex]
3)
[tex]3(x+4)-2=8x+1\\\\3x+12-2=8x+1\\\\3x-8x=1-12+2\\\\-5x=-9 \ \ |:(-5)\\\\\boxed{x=1,8}[/tex]
4)
[tex]2x+1=x-3\\\\2x-x=-3-1\\\\\boxed{x=-4}[/tex]
