Physics Question on Kirchhoff's Laws

Question

In the following circuit, the magnitude of current $I _1$ , is _____ A

Accepted Answer

The correct answer is 1.

Junction law at A,
1x−(y+5)+2x−2+2x−0=0....(1)
Junction law at B,
1y+5−x+1y−0+1y−2=0....(2)
On solving equation (1) and Equation (2) x=3
&y=0
At D junction
I1=i1+i2
I1=1y−0+2x−0
=10−0+23−0
I1=15A