a)6(x-1)+5x+6=11x
<=>6x-6+5x+6=11x
<=>6x-5x-11x=6-6
<=>-10x=0
<=>0
b)2x+5/3-2=3x-7/5
<=>30x/15 +25/15-30/15=45x/15-21/15
=>30x+25-30=45x-21
<=>30x-45x=-25+30-21
<=>5x=-16
<=>x=-16/5
c)x/6+x=2x+1/2
<=>2x/12+12x/12=24x/12+6/12
=>2x+12x=24x+6
<=>2x+12x-24x=6
<=>-10x=6
<=>x=-3/5
d)x/4-2x-1/3=-5x/12
<=>3x/12-24x/12-4/12=-5x/12
<=>3x-24x-4=-5x
<=>3x-24x+5x=4
<=>-16x=4
<=>x=-4