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1.小明和大光同算一道题:(12+x)+y=?他们都很粗心,小明忘了写括号,结果得:12+x+y=14;大光把“÷”号误写为“-”号,结果得:(12+x)-y=15.如果他们各自的计算都是对的,那么原题的正确答数应是多少?
1. Xiao Ming and Da Guang count the same question: (12 + x) + y =? They are all careless. Xiao Ming forgot to write parentheses. The result was: 12+x+y=14; Daguang misunderstood the “÷”. Written as “-” sign, the result would be: (12 + x) - y = 15. If their respective calculations are correct, then the correct answer to the original question should be how much?