Question 832796
very confusing! 
a    ÷       b     *       c               =8
+            d   +          e   *        f
g   +         h     ÷       i               =4
-             j   ÷          k   ÷        l
m    -        n     +       o    =7
=0           p    =1        q    =1      r

I don't understand the rows.

What is the first row?
What is the second row?
What is the third row?