1. If "÷" denotes "multiplied by", "+" denotes "subtracted from", "?" denotes "added to" and "x" denotes "divided by", then which of the following equation is true?
10. If "A" denotes "subtracted from", "B" denotes "added to", "C" denotes "divided by", "D" denotes "multiplied by", then which of the following statement is correct?