2: 3x-6=9
=>3x=6+9=15
=>\(x=\dfrac{15}{3}=5\)
3: 3x-1=5
=>3x=1+5=6
=>\(x=\dfrac{6}{3}=2\)
5: -6+3x=-2
=>3x=-2+6=4
=>\(x=\dfrac{4}{3}\)
6: 7-4x=-1
=>4x=7+1=8
=>\(x=\dfrac{8}{4}=2\)
8: 3x-2=5x
=>3x-5x=2
=>-2x=2
=>x=-1
9: 2x-4=5x
=>2x-5x=4
=>-3x=4
=>\(x=-\dfrac{4}{3}\)
11: -2x+8=-4x
=>-2x+4x=-8
=>2x=-8
=>\(x=-\dfrac{8}{2}=-4\)
12: x-5=-x
=>2x=5
=>\(x=\dfrac{5}{2}\)
14: 7+x=11-3x
=>4x=4
=>x=4/4=1
15: 5-3x=6x+7
=>-3x-6x=7-5
=>-9x=2
=>\(x=-\dfrac{2}{9}\)
17: 2x-6=x+1
=>2x-x=6+1
=>x=7
18: 3x-7=12-x
=>3x+x=12+7
=>4x=19
=>\(x=\dfrac{19}{4}\)
20: 3x+1=7x-11
=>3x-7x=-11-1
=>-4x=-12
=>\(x=\dfrac{-12}{-4}=3\)
21: 15x-10=6x+6
=>15x-6x=6+16
=>9x=25
=>\(x=\dfrac{25}{9}\)
23: 3x+1=5x+2
=>3x-5x=2-1
=>-2x=1
=>\(x=-\dfrac{1}{2}\)
24: 2x-4=3x+1
=>2x-3x=4+1
=>-x=5
=>x=-5
26: 4x-3=2x+2
=>4x-2x=3+2
=>2x=5
=>\(x=\dfrac{5}{2}\)
27: 3x-4=5x+6
=>3x-5x=4+6
=>-2x=10
=>\(x=\dfrac{10}{-2}=-5\)