1) 5x+8\3+11x-1\6=-1
16x+16-1\6=-1
16x+15\6=-1
16x+5\2=-1
16x=-1-5\2
16x=-2+5\2
16x=-7\2
x=-7\32
x=-0.21
2) 4x-5/7-9x-25/2=0
-5x-10+175/14=0
-5x-185/14=0
-5x=185/14
x=-185/70
x=-37/14;-2.64
3) 4x+9/5-4+3x/2=4
4x+9-20/5+3x/2=4
4x-11/5+3x/2=4
10*4x-10*11/5+10*3x/2=10*4
40x-2*11+5*3x=40
40x-22+15x=40
55x-22=40
55x=40+22
55x=62
x=62/55
x=1.12