Can you check my answers please? These sort of confused me, but I might have it right. Thanks! (will post below just gimme a sec :D )

Question

bookworm14 · Answer

Okay, I wrote my answers below each question, please lemme know If you cannot see or understand my answers ni the pic, thanks!

lovedance11 · Answer

Nope

smilie2015 · Answer

2lw+2lh+2wh=s
w(2l+2h)+2lh=s
w(2l+2h)+2lh-s=0
2lh-s=w(2l+2h)
2lh-s/2l+2h=w

johnweldon1993 · Answer

^Not quite, if you wanted to do it that way you forgot a negative sign

smilie2015 · Answer

ur second answer is right

johnweldon1993 · Answer

$$\large s = 2(lw + lh + wh)$$
$$\large s = 2lw + 2lh + 2wh$$
$$\large s - 2lh = 2lw + 2wh$$
$$\large s - 2lh = w(2l + 2h)$$
$$\large w = \frac{s - 2lh}{2l + 2h}$$

bookworm14 · Answer

ohhh I forgot to put my plus sign at the bottom when I wrote it, haha my bad, thank you :)

johnweldon1993 · Answer

Yeah exactly, it is so small and obvious that I overlooked it as well in the beginning, but glad you caught it ^_^

bookworm14 · Answer

Oh yeah, boom! :D I did it right , so freaking happy right now :DDD Thank you John!

johnweldon1993 · Answer

Of course love :D