Question

30, 38 and 40 please

Answer 1

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, $s=-\frac{129}{2}$.

2(b+5)=3(4-b)

2b+10=12-3b

5b=2

$b=\frac{2}{5}$