Jawabanmu

2014-05-05T15:12:30+07:00
(Xa - Xa + Xa - Xa) + (-Xb + 4Xb - 3Xb + 4Xb) + (-2Xc + 5Xc - 3Xc) + (-2Xd + 2Xd) = 8+0+8+0
4Xb = 16
Xb = 4
Bagaimana dengan hasil akhir dari
Xa, Xc, Xd Pak ?
Xa - Xb = 8 --> Xa = 8 + Xb = 8+4 = 12
-Xa + 4Xb - 2Xc = 0 --> -2Xc = Xa - 4Xb = 12-16 = -4 --> Xc = -4/-2 = 2
Xa - 3Xb + 5Xc - 2Xd = 8 --> -2Xd = 8-Xa+3Xb-5Xc = 8-12+12-10 = -2 --> Xd = -2/-2 = 1