Question

I spent 15dollars. earned 30dollars. spent 12 dollars now have 18dollars. how much did I begin with?

Answer 1

You started with $15. 15-15 = 0 and then you earned $30, but spent $12... 30-12= 18 

Answer 2

You started with 15. 15 - 15 = 0 + 30 - 12 = 18