How to distinguish between binary linear equations or inequalities?

According to the conditions given in the question, a very positive statement is to use binary once, for example, there are eight people in total. If there are less than, no more than, how much more than, no less than, no less than and other words in the sentence, then use inequality

Is the addition and subtraction method suitable for solving linear equations of two variables? Why?

As long as the direction of inequality inequality is consistent, we can use the method of solving the system of linear equations of two variables
If the direction is inconsistent, the negative sign is extracted to make the direction consistent

A mathematical problem about inequality and function!
Let f (x) = AX2 + BX + C, the coefficients a, B and C are all real numbers, a ≠ 0, B ≤ a, f (- 1) │ ≤ 1,
When │ f (0) │ ≤ 1, │ f (1) │ ≤ 1, it is proved that │ f (x) │ ≤ 5 / 4
Clear can also add points!
That two is the square of X

The remainder of a natural number greater than 1 divided by 326.258.207 is the same. The natural number is ()
It's division, not division. It's the reverse.

326 - 258 = 68
258 - 207 = 51
The greatest common divisor of 68 and 51 is 17. Every divisor of 17 satisfies the condition
But 17 is a prime number, and because the title condition is greater than 1, the number can only be 17

The polar equation ρ Cos2 θ = 2cos (2 π / 3 - θ) is transformed into a rectangular equation

The two sides of the same product are multiplied by the two sides of the same product, and the two sides of the same product are multiplied by ρ (t = 2, ρ cos (2 π / 3-θ) cos (2 π / 3-3-θ) is expanded by the trigtrigonometric formula for the expansion of ρ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\3535;178; = -

Mathematics problems in grade one of junior high school
Decomposition factor: 10A (X-Y) ^ 2 - 5B (Y-X)
4x^2-100
(a+b)^2-4(a+b-1)
It is known that a and B are arbitrary real numbers, and M = a ^ 2 + B ^ 2, n = 2Ab
There should be a process. Be clear. Thank you

1:10a（x－y）²－5b（y－x）＝10a（x－y）²＋5b（x－y）
＝5（x－y）（2ax－2ay＋b）
2:4x²－100＝（2x）²－10²＝（2x－10）（2x＋10）
＝4（x－5）x＋5）
3:（a＋b）²－4（a＋b）＋4＝（a＋b－2）²
4:∵M－N＝a²＋b²－2ab＝（a－b）²≥0
∴M＞N.

It is known that Y1 = X-1 and y2 = 6 / X
Let's ask another question. We know that the image of a function y = 2x-k intersects the image of an inverse scale function y = K + 5 / x, in which the ordinate of a point is - 4. Find the analytic expressions of the images of the two functions

y1=y2
x-1=6/x(x≠0) x^2-x-6=0 (x-3)(x+2)=0
x1=3 x2=-2
y1=2 y2=-3
Supplementary questions
X = 1 / 2 (y + k)
Get k = 1.2 back to the function
y=2x-1.2 y=5/x+6/5

If X & # 178; - 4x + 1 = 0, find the value of X & # 178; + 1 / X & # 178; and the fourth power of X & # 178; / x-3x & # 178; + 1

X²+1=4X
X+1/X=4
(X+1/X)²=16
X²+2+1/X²=16
∴X²+1/X²=14.
X²/［X^4-3X²+1］
=1/［X²-3+1/X²］
=1/11.

It is known that images with positive scale function y equal to KX and inverse scale function y equal to 6 / X all pass through point a (m, - 4), and the analytic expression of the positive scale function is obtained

Because y = 6 / X goes through a (m, - 4), so m = - 3 / 2, so a (- 3 / 2, - 4). Because y = KX goes through a (- 3 / 2, - 4), so k = 6, so y = 6x

There must be solutions to the main problems (equations)

A. The distance between B and B is 480 kilometers. A local train leaves from a, traveling 60 kilometers per hour. An express train leaves from B, traveling 65 kilometers per hour. (1) how many hours do the two trains meet each other when they leave at the same time, opposite each other? (2) how many hours do the two trains leave each other when they leave at the same time, opposite each other, traveling 620 kilometers apart? (3) the local train starts for one hour, and then the express train leaves

How to distinguish between binary linear equations or inequalities?