Question

Rezolvati ecuatia: {I1+I2=I3 {12=10I1+40I3 {-12 =20I2+40I3

Answer 1

l1-a l2-b l3-c
a+b=c
10a+40c=12
20b+40c=-12
10a+40c+20b+40c=0
10a+10b+10b+80c=0
10b+90c=0
b+9c=0
b=-9c
-180c+40c=-12
-140c=-12
c=3/35
b+27/35=0
b=-27/35
a=30/35
l1=30/35 l2=-27/35 l3=3/35
coroana