I'm trying to figure out this equation which uses Standard Addition. I don't get how they get the final answer considering that there are two unknowns.Standard Addition Q.jpg

I'm trying to figure out this equation which uses Standard Addition. I don't get how they get the final answer considering that there are two unknowns.Standard Addition Q.jpg
Dang, I was expecting to see something that I could answer like (10 + 3 = ?)
A hundred and three!
Sunuva...
Fine, then.
« What If: pressure cookers  Internal Standard Question » 