A = 21w + 21h + 2wh Solve for h
A = 21w + 21h + 2wh
A-21w = 21w-21w +21h + 2wh
A -21w = 21h + 2wh
(A-21w)/ (21+2w) = h(21+ 2w)/(21+2w)
=
(A-21w)/(21+2w)
A = 21w + 21h + 2wh Solve for h
4 answers
h = (A-21w)/(21+2w)
this sucks
idk