d=a-2bc
(a-d)/2c=b
(a+d)/2b=c
d = a - 2bc
4ac + 2ad + 2bc +bd = 2a*(2c + d) + b*(2c + d) = (2c + d)*(2a + b)
d=a-2bc
(a-d)/2c=b
If a=2bc+db= (a - d) / 2c If a=2b+c b=1/2(a-c)
Type your answer here... a = 2bc-d add d to both sides a + d = 2bc divide both sides by 2b (a+d)/2b = c
a+2bc + d is d= a - 2bc
A = 2bc - dAdd 'd' to each side of the equation:A + d = 2bcDivide each side by 2b :(A + d)/2b = c
(a+d)/2b=c
d = a - 2bc
c= (a+d) / 2b
d = a - 2bc
If: a = b+c+d Then: c = a-b-d
4ac + 2ad + 2bc +bd = 2a*(2c + d) + b*(2c + d) = (2c + d)*(2a + b)