The following equations are transformed into the form of Y expressed by the algebraic expression of X, and the value of Y is obtained when x = - 3, x = 3 2x-y=-1 x+4y-5=0

The following equations are transformed into the form of Y expressed by the algebraic expression of X, and the value of Y is obtained when x = - 3, x = 3 2x-y=-1 x+4y-5=0

2x-y=-1
y=1-2x
When x = 3, y = - 5
When x = - 3, y = 7
x+4y-5=0
y=(5-x)/4
When x = 3, y = 1 / 2
When x = - 3, y = 2

Send points! A very simple mathematical problem
1. A reward of 100 points
2. The problem is very simple
3. The first person who answers correctly will get 100 points
Question: since May 8, 2007, 1000 days have been spent. What are the years, months and days now
If you give me your calculation method and the result, you can add points correctly, which indicates that the year 2008 is 366 days. If you answer correctly, the calculation method is also very good, but you don't get it right with your calculation method. There is a date calculator on the Internet, which only gives the answer but not points!
The ninth floor is correct, but the method is not. The second floor mainly ignores the word "spend" and calculates one more day. The third floor knows that it has more than 95 days in three years and 366 days in 2008, but it has reduced 94 days in the end. Ha ha, one more day than 95 days should be reduced by 96 days, so it is two more days than the final answer
In fact, the date of the question will make people ignore a lot of things, and a lot of calculation methods, the answer is February 1, the 9th floor answered correctly, but also said their own calculation method, given to the 9th floor, you can find a date calculator on Baidu to calculate a look, the method you say is very good, but there are some errors in the middle of the calculation, thank you

After 366 days, May 8, 2008, 365 days, May 8, 2009, 365 days, May 8, 10 years, more than 1000 days, 96 days, 30 days ahead, 66 days left on April 8, 31 days ahead, 35 days left on March 8, 28 days ahead, 7 days left on February 8, 2010

Four tons of coal are divided into five piles on average. The weight of each pile accounts for several parts of the total weight. The weight of each pile accounts for several parts of the total weight. The weight of each pile is several parts of one ton and several parts of four tons

Four tons of coal are divided into five piles on average. The weight of each pile accounts for one fifth of the total weight, four fifths of the weight of each pile, four fifths of one ton and one fifths of four tons