198. A和B兩個人A total income = c + q percent of his property excess 1000. B的total income = d + r percent of his property excess 1500. 兩人的preperty是2000有一樣的Income 問下列哪個正確?
198. A和B兩個人A total income = c + q percent of his property excess 1000. B的total income = d + r percent of his property excess 1500. 兩人的preperty是2000有一樣的Income 問下列哪個正確?