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Anonymous users2024-02-11One. Column equation solution.
A has the same solution as Eq. 1 2 (x-1) = 5 and Eq. 1 3 (ax-4) = 6.
Equation 1 2 (x-1) = 5 is the solution and is x = 11
Substituting: 1 3 (ax-4) = 6
Get 1 3 (11a-4) = 6
Solution: a=2
Split 60 into two numbers so that the first number plus 2 times 3 equals the second number, what are these two numbers?
The first number is: (60-3*2) (2+1)=18
The second number is: 60-18=42
Warehouse A stores 200 tons of coal, warehouse B stores 70 tons of coal, and warehouse A transports 5 tons of coal to warehouse B every day, how many days later will warehouse A and warehouse B have the same amount of coal?
200-70) (5*2) = 13 days.
Two. Fill-in-the-blank questions.
1.Draw any card from a deck of playing cards, and the probability of drawing a club is greater than, less than, equal to) the probability of touching a heart.
The answer is: yes.
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Anonymous users2024-02-101\2（x-1)=5 --x=11
1\3(ax-4)=6 --x=22/a
11=22/a
a=2, let the two books be x, 60-x, respectively
x+3）2=60-x
2x+6=60-x
3x=54x=18
60-x=42
Set up x days later, there will be as much coal in warehouse A and B.
200-5x=70+5x
10x=130
x=13 equals.
The number of clubs in a deck is the same as the number of hearts.
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Anonymous users2024-02-09Analysis: The total price of the house is 120,000
30000 down payment
It is required for the second year.
It is payable in the third year.
5000+(120000-30000-5000)*4th year.
5000+(120000-30000-5000*2)*, and so on.
Answer: (1) The third year needs to be paid:
5000 + (120000-30000-5000) * yuan (2) Y yuan in the first year of x:
The first year y=30000
After the second year:
y=5000+(120000-30000-5000*(x-2))*Note: This function is piecewise function.
3) The annual interest rate is not less than 400 yuan, that is, y-5000 400 inequality is solved x:2 x 4
That is, the total expenditure from the second year to the fourth year:
5450 + 5425 + 5400 = 16275 yuan.
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Anonymous users2024-02-08The idea of this problem is as follows: knowing a system of ternary equations, and finding the range of values of another ternary function, it is necessary to turn the ternary function into a unary function, that is, to turn y and z into x. From 3x+2y-z=4 and 2x-y+2z=6, we can add the two known equations to get :
5x+y+z=10
Shift the term to get: x+y+z=10-4x, because: x, y, z are all positive numbers, so 10-4x<10, so 0
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Anonymous users2024-02-07Add two known equations together.
5x+y+z=10
x+y+z=10-4x<10
x, y, z>0
0
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Anonymous users2024-02-061) If Mr. Sun's monthly salary is 3850 yuan, the taxable income is (3850-3500=350), and the personal income tax payable is (350*3%=).
If the monthly salary of the principal is 7800 yuan, the taxable income is (7800-3500=4300), and the personal income tax payable is (1500*3%+(4300-1500)*10%%=325).
2) Xiao Ming's mother's monthly taxable income is 500 yuan per month, and Xiao Cong's mother's salary is 5,200 yuan per month.
Xiao Ming's mother's monthly taxable personal income tax = 500 * 3% = 15 yuan.
Satoshi's mother's monthly taxable income = (5200-3500) = 1700
Xiao Cong's mother's monthly taxable personal income tax = 1500 * 3% + (1700-1500) * 10% = 65 yuan.
3) Xiaohua's mother's monthly personal income tax payable is 94 yuan, how much is Xiaohua's mother's monthly salary?
If Xiaohua's mother's monthly salary is x yuan, then.
1500*3%+（x-3500-1500）*10%=94
The solution is x=5490
Therefore, Xiaohua's mother's monthly salary is 5,490 yuan.
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Anonymous users2024-02-051）350,4300, 325
2) Xiao Ming's mother: 500 3% = 15 yuan.
Satoshi's mother: 5200-3800=1700
45 + 20 = 65 yuan.
3) 94-45 = 49 yuan (45 yuan is the tax of the part not exceeding 1500 yuan).
49 10% = 490 yuan.
3500 + 1500 + 490 = 5490 yuan.
The first that leads to the object clause that follows.
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