+15000 if a+1=b+2=c+3=d+4=a+b+c+d+5 what is a+b+c+d?
Hello Dennis!
a = d + 3
b = d + 2
c = d + 1
d + 4 = a + b + c + d + 5
d + 4 = d + 3 + d + 2 + d +1+ d + 5
- 3 d = 7
d = - 3/7
a + b + c + d = - 3/7 + 3 - 3/7 + 2 - 3/7 + 1 - 3/7
= - 4 * 3/7 + 6 = - 12/7 + 42/7 = 30/7 = \(4.\overline{285714}\)
!
