120 + 2x (2 + 2) = 4x + (x + 6) x2 term solution equation, write the specific process No, it's 120 plus 2 times (2 plus 2) = 4x plus (x plus 6) times 2

120 + 2x (2 + 2) = 4x + (x + 6) x2 term solution equation, write the specific process No, it's 120 plus 2 times (2 plus 2) = 4x plus (x plus 6) times 2

120+2x4=4x+2x+12
128=6x+12
x=58/3

(1)4x+(20-x)x2=60

4x+(20-x)x2=60
4x+40-2x=60
2x=60-40
2x=20
x=10
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How to solve the equation 4x + (12-x) x2 = 38

4x+24-2x=38
2x=14
x=7

The following set is represented in a proper way: a set consisting of all even numbers divisible by 111

This is the set of even numbers that can be divisible by 111
This is a set of even numbers that can divide 111. It's an empty set!

A set of all even numbers
I personally think it should be {x | x = 2A (a ∈ n)} but the answer is {x | x = 2A (a ∈ z)}
I think integers should contain negative integers, while odd and even numbers are determined in the range of natural numbers. They should belong to N. why do they belong to Z
Which prawn can solve the little girl's doubts,

Expanded
Any integer that can be divided by two is called an even number

Out of the five numbers 23579, choose four to make up the four digits that are divided by 3 and 5, and the remaining two. What are the four digits

The number minus 2 is a multiple of 15, so the end of the number minus 2 must be 5 or 0
3797,3977,7397,7937,9737,9377,2372,2732,3722,3272,7232,7322,2792,2972,7292,7922,9722,9272
Total 18

A two digit number is a multiple of 3 and 5. If the two digit number is odd, the maximum number is 0___ If it's even, the minimum is___ ．

It is known from the analysis that a two digit number can be divided by 3 and 5 at the same time. If the number is odd, the maximum is 75; if it is even, the minimum is 30; so the answer is: 75, 30

What is the maximum even number that can be divisible by 3 and what is the maximum odd number that can be divisible by 3 and 5 at the same time?

They are 996975

A two digit number can be divided by 3 and 5 at the same time. If the number is odd, the maximum number is

Then the odd number should be a multiple of 15;
15*a

The smallest even number that can be divisible by 3.5 at the same time, and the largest three digits are

30
nine hundred and ninety