3(6-4x)-27x=10x-31
18-12x-27x=10x-31
18-39x=10x-31
-49x=-49
Therefore, x=1.
s/6-s/2+1=45/2.
s-3s+6=135
-2s=129
Therefore, [tex]s=-\frac{129}{2}[/tex].
2(b+5)=3(4-b)
2b+10=12-3b
5b=2
[tex]b=\frac{2}{5}[/tex]
