A stationery factory processes 2500 sets of drawing tools for students. After processing 1000 sets, it adopts new technology, which makes the daily work efficiency 1.5 times of the original. As a result, it completes the task five days ahead of time. How many sets of drawing tools for students are processed by the stationery factory every day

A stationery factory processes 2500 sets of drawing tools for students. After processing 1000 sets, it adopts new technology, which makes the daily work efficiency 1.5 times of the original. As a result, it completes the task five days ahead of time. How many sets of drawing tools for students are processed by the stationery factory every day

Suppose that the stationery factory used to process x sets of drawing tools every day. According to the Title Meaning: 2500 − 1000x-2500 − 10001.5x = 5. Solving the equation, we get x = 100. After testing, x = 100 is the root of the original equation. Answer: the stationery factory used to process 100 sets of drawing tools every day

Of the 420 parts, Party A makes x parts per hour, Party B makes y parts per hour, Party A cooperates for 3 hours, Party B goes, and Party A does it alone for 5 hours

3x+3y+5x=420
8x+3y=420

Whether there is an integer n, so that the roots of the univariate quadratic equation NX & sup2; - 5x + 6 = 0 and X & sup2; - 4nx + 4N & sup2; - 5n-11 = 0 about n are integers. If there is, find out all the N satisfying the condition. If not, explain the reason

In fact, I'm taking a lot of risks to answer your question, because recently many level 1 and anonymous malicious closing questions, but I believe you, don't let me down. According to the discriminant △≥ 0, then 25-24n ≥ 05n + 11 ≥ 0 ℅ - 2 ≤ n ≤ 1n can make - 2 - 101 be substituted into the above formula, if all are square numbers