2=2 (lw+lh+wh) solve for w
solve for w.2=2(lw+lh+wh)Flip the equation.2hl+2hw+2lw=2Add -2hl to both sides.2hl+2hw+2lw+−2hl=2+−2hl2hw+2lw=−2hl+2Factor out variable w.w(2h+2l)=−2hl+2Divide both sides by 2h+2l.w(2h+2l) / 2h+2l=−2hl+2 / 2h+2lw=−hl+1/h+l