Solve A=a+b+c+d divided by 4 for c
Given equation is\(A = \frac{a+b+c+d}{4}\)Now we can multiply both sides by 4\(4A = a+b+c+d\)On subtracting (a+b+d) on both sides.\(4A -(a+b+d) = (a+b+c+d) - (a+b+d)\)\(4A - a - b - d = c\)So c is \(c = 4A - a -b-d\)