3 × 3 (x + 2) = 4 (x + 2) + 60,2 / 2 x = 3x-1,2 (2y-1) - 3 (3y-5) = 12,10y + 5 (Y-1) = 3 (7-y)

3 × 3 (x + 2) = 4 (x + 2) + 60,2 / 2 x = 3x-1,2 (2y-1) - 3 (3y-5) = 12,10y + 5 (Y-1) = 3 (7-y)

X=25/7
X=2/5
Y=1/5
Y=13/9

Given x + y = m, find the value of (x + y) ^ 2 (2x = 2Y) ^ 2 (3x = 3Y) ^ 2

（x+y)^2(2x+2y)^2(3x+3y)^2
=(x+y)^2×4（x+y）^2 × 9（x+y）^2
=36（x+y）^5
=36m^5

How much is 2000 divided by one in two? Why not

2000/(1/2)=2000*2=4000
Dividing by a number is equal to multiplying by its reciprocal, which is the rule of mathematical calculation

The third power of 5A - the square of 2A + the third power of a-2a - the square of 6A - 1 (fast

5a^3-2a^2+a-2a^3-6a^2-1
=5a^3-2a^3-2a^2-6a^2+a-1
=3a^3-8a^2+a-1

Add the nine numbers 2.4.6.8.10.12.14.16 and 18 to make the sum of horizontal, vertical and oblique lines equal to 30

4 14 12
18 10 2
8 6 16
Analysis shows that 246 can't be collinear (adding can't get 30), and 6 and 12 can't be collinear (6 + 12 + 12 = 30 repeat)
Therefore, it can be determined that 6 is not in the middle and not in the corner, and one of the three sides can be randomly selected to place 6
4XX 2XX
XX2 XX4
X6X X6X
2 and 8 cannot be collinear, so the second beat method is excluded
Take:
4xx
xx2
x6x
Since the middle number is 10, we put 10 in the middle
Then fill in all the data to verify that they are correct and get the solution

Given the system of equations {2x-y + Z = 3,3x + 4y-z = 8, x + y-2z = - 3, if Z is eliminated, the system of quadratic equations with two variables is obtained (), if y is eliminated, the system of quadratic equations with two variables is obtained
If we eliminate Z, we get a system of linear equations of two variables (), if we eliminate y, we get a system of linear equations of two variables (), if we eliminate y, we get a system of linear equations of two variables (), if we eliminate x, we get a system of linear equations of two variables (),
Binary linear equations

If Z is eliminated, the system of linear equations of two variables (5x + 3Y = 11, 5x-y = 3) is obtained. If y is eliminated, the system of linear equations of two variables (3x-z = 0, 11x + Z = 20) is obtained. If x is eliminated, the system of linear equations of two variables (3y-5z = - 9, y + 5Z = 17) is obtained,

What does 7 out of 12 divide by 5 out of 13 mean

It means that the product of two known numbers is 7 / 12, and one of the factors is 5 / 13. How much is the other factor

The known numbers are: 1, 34, 597, 16925 According to this rule, the nth number is expressed by algebraic expression______ ．

The nth number should be 2n − 1n2

True or false: there are two zeros at the end of the product of 60 times 50
There are two zeros at the end of the product of 60 times 50. There are only two zeros at the end of the product of 60 and 50?

There are two zeros at the end of the product of 60 times 50
There are only two zeros at the end of the product of 60 and 50 - three zeros

The height of a triangle is 1.8 meters, the area is 21.6 square meters, how many meters is the low

21.6 × 2 △ 1.8 = 24m
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