X/3+x/6+x=-9/2 28/x-8=1 x-7/x-15=3 11-x/5=x/6 x²-8x=0

Question

X/3+x/6+x=-9/2
28/x-8=1
x-7/x-15=3
11-x/5=x/6
x²-8x=0

Answer 1

1)х=-3
5)х=0; х=8
4) х=33