Let a+1=b+2=c+3=d+4=a+b+c+d+5a + 1 = b + 2 = c + 3 = d + 4 = a + b + c + d + 5a+1=b+2=c+3=d+4=a+b+c+d+5 . What is a+b+c+da + b + c + da+b+c+d ?