A = 2bc - d
Add 'd' to each side of the equation:
A + d = 2bc
Divide each side by 2b :
(A + d)/2b = c
c= a-2b
a-2b=c
b= 1/2 (a - c)
1
c= (a+d) / 2b
l= A/ W
Not sure about the original formula, but one that works is b = a/(2c + 1)
c= a-2b
a-2b=c
d=a-2bc
(a+d)/2b=c
a = 2b + c then a - 2b = c ie c = a - 2b
c=a-b
b= 1/2 (a - c)
1
You can't solve a formula with no equals sign
c= (a+d) / 2b