八年级数学题求助
increasing theprice of a product A by 20% fives the same answer as decreasing the price of product B by the same margin. if B costs $42 what does product A cost? 评论 A costs $140...? EquationA + 20%A = 5 (B - 20%B) Known B = 42 HOPING I'M...澳洲华人论坛