2x-3 = 3x + 5 to solve the equation 2x-3 = 3x + 5 to solve the equation

2x-3 = 3x + 5 to solve the equation 2x-3 = 3x + 5 to solve the equation

2X-3=3X+5
3X-2X=-3-5
X=-8

How to solve the equation 3-3x = 2x + 3

2x+3x=3-3
5x=0
x=0÷5
x=0

2x-0.24 = 0.12 equation checking

2X-0.24=0.12
2x=0.12+0.24
2x=0.36
x=0.36÷2
x=0.18
checking calculation:
Left 2x-0.24
=2*0.18-0.24
=0.12
Right 0.12
Left = right
So x = 0.18 is the solution of equation 2x-0.24 = 0.12

Solve the equation x (X-7) = 3x + 24

x²-10x-24=0
（x-12）（x+2）=0
X = 12 or x = - 2

A barrel of oil with oil weighs 15 kg. After eating half of the oil, the barrel weighs 8 kg. How much is the oil

1 barrel of oil + 1 barrel = 15 kg
Half barrel oil + barrel = 8kg
So, half a barrel of oil = 15-8 = 7 kg
Therefore, a barrel of oil 2 * 7 = 14 kg
So barrel = 15-14 = 1kg

It is proved that the limit of F (x) = limx * SiNx does not exist!
In this problem book, it is said that if xn = 2n π + π / 2, the limit is infinite, and if yn = n π, the limit is zero, so the limit does not exist! But if yn = n π, it is n π * Sinn π! That is infinite * 0. Can we say that the limit is zero?
Tell you to prove boss @!

In fact, for the second case, n is not infinite, and f (n π) = n π * Sinn π n is a positive integer. In fact, f (x) is a subsequence of the original function, and each term of it is zero. You can try it. When n = 100, it is 100 π * 0 = 0. The condition for the existence of limit is that when x approaches infinity, the limit of any subsequence from X to infinity is equal, But here two limits are different, then we can say that the original function has no limit
In fact, this function is a sequence of functions whose values increase and oscillate when x approaches infinity. When the independent variable approaches infinity, the amplitude of oscillations approaches infinity, then there must be no limit

Definition: connecting two expressions with a comma is called a comma expression. Its general expression form is: "expression 1, expression 2". The value of the whole comma expression is equal to the value of expression 2, for example, the value of "3, 5, 6, 8" is 14, the known value of "a, B, A-B" is 4, and the value of "AB, a, 2b" is 7. Calculate a
There's a bonus. Come on!

1：a-b=4；
2：a+2b=7；
2-1:3b=3；b=1；a=5；

Poems describing the scenery of the Three Gorges
Who has a poem about the Three Gorges? Help to write it

The Moon Song of Mt. Emei (Li Bai) the moon of Mt. Emei is in the middle of autumn, and it is reflected in the water of the pingqiang river. At night, the clear river flows to the Three Gorges, and you can't see the next Yuzhou. At night, the moon and the moon of Mt

The proof of Taylor formula
Let LIM (x - > 0) f (x) / x = 1 and f '' (x) > 0 prove that f (x) > = X

Because LIM (x - > 0) f (x) / x = 1
So f (x) = x + F '' (θ x) / 2 * x ^ 2
Because f '' (x) > 0
So f (x) > = x

There are 35 boys in class 52, accounting for 62.5% of the total number of students in the class. How many students are there in the class?

It's 56.875 by calculator