I1=U/R, R=R1+R2*R3/(R2+R3)=2,8+2*3/(2+3)=2,8+1,2=4 Ом
I1=20/4= 5 А
I2=I1*R3/(R2+R3)=5*3/(2+3)=15/5=3 A
I3=I1*R2/(R2+R3)=5*2/(2+3)=10/5=2 A
I1=U/R, R=R1+R2*R3/(R2+R3)=2,8+2*3/(2+3)=2,8+1,2=4 Ом
I1=20/4= 5 А
I2=I1*R3/(R2+R3)=5*3/(2+3)=15/5=3 A
I3=I1*R2/(R2+R3)=5*2/(2+3)=10/5=2 A