U₃=I₃*R₃=2*15=30 B
U₂=U₃=30 B, I₂=U₂/R₂=30/10=3 A
I₁=I₄=I₂+I₃=3+2=5 A
U₁=I₁*R₁=5*2=10 B
U₄=I₄*R₄=5*4=20 B
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U₃=I₃*R₃=2*15=30 B
U₂=U₃=30 B, I₂=U₂/R₂=30/10=3 A
I₁=I₄=I₂+I₃=3+2=5 A
U₁=I₁*R₁=5*2=10 B
U₄=I₄*R₄=5*4=20 B