pTugasan 3 bp pTugasan 3 bA : X1 + 450 = X2 + 610 X1 - X3 = 100B : X1 + 100 = 270 + X2 X1 - X2 = 170C : X2 + 2x3 = 120 + X3X2 - X3 = 120p p= R2 R1 - = R3 R2 - = R1 + R3 - =R2 + R3 - =p