Solve inequality (3x + 2) / 4 - (x-1) and find its non positive integer solution

Solve inequality (3x + 2) / 4 - (x-1) and find its non positive integer solution

That is: (3x + 2) / 4-2 (x-1) / 4 > 0
(3x-2x+2+2)/4>0
(x+4)/4>0
So x > - 4
Its non positive integer solution is: - 3, - 2, - 1,0

The number of positive integer solutions of inequality 2x + 2 ≥ 3x-1 is
A: 1
B: 2
C: 3
D: 4

First, solve the inequality
2x+2>=3x-1
2+1>=3x-2x
3>=x
x

Given that the positive integer solution of inequality 3x-a ≤ 0 is only 1.2.3, then the value range of a is（

a> When x = 3x, x = 3, a > = 9 is obtained;
Because the positive integer solution is 1,2,3. The implicit condition is not true when x = 4
When x = 4, a > = 3x = 12 does not hold
So 9

[emergency, emergency] mathematics calculation in grade two of junior high school (1) root sign 24 times 3 times 2
[urgent, urgent] mathematics calculation in grade two of junior high school
(3) Radical (1 and 2 / 3) & sup2; plus (1 / 3) & sup2;
(4) 2 radical 6 plus (radical 3 minus radical 2) & sup2;
Do as much as you can

12 √ 6 read 12 times root 6
2.18b √ 3 / A ^ 3 read a third power of 18B times root sign 3
3.16/9 read 9 / 16
four point five

The original price of a commodity is 200 yuan. First increase the price by 1 / 10, then decrease the price by 1 / 10. How much is the current price of this commodity?

200×（1+1/10）（1-1/10）
=200×11/10×9/10
=198 yuan

Find the domain of definition and range of value of function y = 4 ^ (x2 + X + 3 / 4)

Domain: X can be any value
Range:
x^2+x+3/4=(x+1/2)^2+1/2>=1/2
=>y>=4^(1/2)=2

A and B set out from a and B, which are 100 kilometers apart. A rode and B ran at the same time. In the process of walking, a's car broke down and it took one hour to repair. Four hours after starting, a and B met. It is known that a's speed is twice that of B, and a's car has been repaired when they met. So what are the speeds of a and B?

Let the velocity of B be x, then the velocity of a is 2x, and the result is: 2x × 3 + 4x = 100 & nbsp; & nbsp; 6x + 4x = 100 & nbsp; & nbsp; & nbsp; & nbsp; 10x = 100 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 10. The velocity of a is 2x = 2 × 10 = 20

The price of a color TV set is now reduced by 29, so it should be replaced______ As unit "1", the current price is the original price______ ．

According to a kind of color TV, if the price is reduced by 29, the original price of color TV can be regarded as unit "1"; the current price is the original price: 1-29 = 79

2008+2007-2006-2005+2004+2003-2001-2000+.+4+3-2-1

Four in a group, a total of 2008 △ 4 = 502 groups
(2008+2007-2006-2005)+(2004+2003-2001-2000)+.+(4+3-2-1)
=4+4+.+4
=4×502
=2008

System of inequalities
one
2x-1＞0
x+1＜3
two
-3x-1＞3
2x+1＞3
three
3（x-1)+13＞5x-2(5-x)
5-（2x+1)＜3-6x
four
x-3(x-2)≥4
（1+2x）/3＞x-1
five
x-3(x-2)≥4
（2x-1）/5＞（x+1）/2
6.1/2(x+4)＜2
（x+2)/2＞（x+3)/3
Second question:
This paper summarizes the general steps of solving the system of linear inequalities with one variable, and compares it with solving the system of linear inequalities with one variable
Compare the two inequalities

1.2x-1＞0 2x＞1 x＞0.5
x+1＜3 x＜2 ∴0.5＜x＜2
2.-3x-1＞3 -3x＞4 x＜-4/3
2X + 1 ＞ 3 2x ＞ 2 x ＞ 1, so the original inequality system has no solution
3.3（x-1)+13＞5x-2(5-x) 3x-10＞5x-10+2x -4x＞0 x＜0
5-（2x+1)＜3-6x 5-2x-1＜3-6x 4x＜-1 x＜-1/4 ∴ x＜-1/4
4.x-3(x-2)≥4 x-3x+6≥4 -2x≥-2 x≤1
（1+2x）/3＞x-1 1+2x＞3x-3 -x＞-4 x＜ 4 ∴ x≤1
5.x-3(x-2)≥4 x≤1
（2x-1）/5＞（x+1）/2 4x-2＞5x+5 -x＞7 x＜-7 ∴x＜-7
6.1/2(x+4)＜2 x+4＜4 x＜0
(x + 2) / 2 ＞ (x + 3) / 3 3x + 6 ＞ 2x + 6 x ＞ 0  no solution
Induction: the general steps are the same as solving the linear equation of one variable, but when both sides multiply and divide a negative number at the same time, the direction of the unequal sign changes. When the greater is less than the smaller, there is no solution. Take the greater as the greater, take the smaller as the smaller, take the middle as the smaller, and there is no solution