Question

5+4=7+1=
6+3=2+2+1=
7=3+9=6+
1+5+3=5=1+

Answer 1

5+4=7+1= 5+2/9=8
6+3=2+2+1= 1/ 9=5
7=3+9=6+11/7=12=6+?
1+5+3=5=1+3/9=5=1+?