在解数学题时,有时同样的错误你可能不止犯一次,下面就去看看祖梦扬同学的经历吧.课外作业中有一道习题:甲、乙两水管往某一水池中注水,甲水管单独打开20小时可注满一池水,乙水管单独打开40小时可注满一池水.现在甲水管单独打开8小时后,再打开乙水管,问:两水管一起打开后需多少小时可注满水池?我很快列出一元一次方程,设两水管一起打开后需x小时可注满水池,根据题意,得 In the solution of math problems, sometimes the same error you may not only commit a crime, the following went to see the experience of ancestral classmate class work in homework have a problem: A, B two water pipes to a pool of water, a water pipe Open a separate 20 hours to fill a pool of water, open a separate 40-hour water pipe can be filled with a pool of water. Now a separate open 8 hours after a water pipe, and then open the water pipe, Q: How long after two water pipes open to fill the pool ? I quickly listed a one-time equation, set up two water pipes to open together with x hours to fill the pool, according to the problem, too