Помогите пж. 5 вариант
I2=U2/R2=60/12=5A; U1=U2=60B; I1=U1/R1=60/6=10A: R34=R3+R4=10+2=12 OM; R345=12/2=6 OM: R=R12+R345=4+6=10 OM; I12=5+10=15A; I=15A; U=I*R=15*10=150B; I5=15/2=7,5A; I3=I4=7,5A; U3=I3*R3=7,5*10=75B: U4=I4*R4=7,5*2=15B: U5=U3+U4=75+15=90B