Wei Wei is 8 years old and his father is 34 years old______ My father is three times as old as Wei Wei

Wei Wei is 8 years old and his father is 34 years old______ My father is three times as old as Wei Wei

The age difference between father and son is: 34-8 = 26 (years old). When father's age is three times that of Weiwei, Weiwei's age is: 26 ÷ (3-1) = 13 (years old) 13-8 = 5 (years old). A: in three years, father's age is three times that of Weiwei. So the answer is: 5

Dad is 25 years older than Xiao Gang, and his age is 3 years younger than 5 times of Xiao Gang's age

x-y=25 x=5y-3 5y-3-y=25
My father is 32 years old

My father is 25 years older than Xiao Gang. My father is five times younger than Xiao Gang. How old is my father

It's very simple to use the equation. Have you learned it?
Let Xiao Gang be x years old
5x-3=x+25
4x=28
x=7
7 + 25 = 32 years old
Or (25 + 3) \ (5-1) = 7 (years old)
7 + 25 = 32 years old
PS: the equation is absolutely right. I'm not sure about the formula, because it's based on the equation

Mr. Wang is 30 years old, Xiaoqiang is 11 years old and Xiaoming is 12 years old. In a few years, will the sum of the ages of Xiaoqiang and Xiaoming equal Mr. Wang's age?
Request complete process, otherwise do not give points
solve equations.

Seven years every year

Given that the polynomial x ^ 3-ax ^ n + 2x ^ 2-x is a cubic binomial, then a + n =?

According to the meaning of the title
a=2
,n=2
So a + n = 2 + 2 = 4

In a store, the purchase price of a product is 2000 yuan per piece. If the product is sold at 80% of the price, the profit of each product will be reduced by 60%______ Yuan

Suppose the price of goods is x yuan, x-80% x = 60% (x-2000) x = 3000, so the price of goods is 3000 yuan

197 + 199 + 201 + 203 + 205. + 2003 + 2005 =? (to be simple)

This is a group of arithmetic sequence summation sequence, also known as Gauss theorem, the formula is (first term + last term) × number of terms △ 2
Because the difference between each number is 2, we can get the rule and find the number of terms: (2005-197) △ 2 + 1 = 905
So there are 905 numbers in this series
From this formula, we can get the formula: (197 + 2005) × 905 △ 2 = 996405
Answer: 996405

If a is greater than B and greater than 0, then | - a-b|=___________________

|-a-b|=a+b

61.6+31.9-56

61.6＋31.9－56
＝61.6＋31.4＋0.5－56
＝93＋0.5－56
＝37.5

Fill in the blanks according to the rules, two fifths, one third, one fourth, two nines

2/5,1/3,(2/7),1/4,2/9
It is first formed into 2 / 5, 2 / 6, (2 / 7), 2 / 8, 2 / 9
The numerator is 2, and the denominator is 5, 6, 7, 8, 9