I₁=I₂=1 A
I₁₂=I₁+I₂=1+1=2 A
1/R₁₂=1/R₁+1/R₂
1/R₁₂=1/10+1/10=2/10=1/5
R₁₂=5 Ом
U₁₂=I₁₂*R₁₂=2*5=10 В
I₁₂=I₃₄₅=I₆₇=2 A
1/R₃₄₅=1/R₃+1/R₄+1/R₅
R₃₄₅=3 Ом
U₃₄₅=I₃₄₅*R₃₄₅=2*3=6 В
U₃₄₅=U₃=U₄=U₅=6 B
I₃=U₃/R₃=6/12=0,5
I₄=U₄/R₄=6/6=1 A
I₅=U₅/R₅=6/12=0,5 A
1/R₆₇=1/R₆+1/R₇
R₆₇=4 Ом
U₆₇=I₆₇*R₆₇=2*4=8 В
U₆₇=U₆=U₇=8 B
I₆=U₆/R₆=8/6=4/3=1,(3) А
I₇=U₇/R₇=8/12=2/3=0,(6) А