How to solve the equation (x + 55) multiplied by 3 + 25 = 325

How to solve the equation (x + 55) multiplied by 3 + 25 = 325

(x+55)x3+25=325
(x+55)x3=325-25
(x+55)x3=300
x+55=300/3
x+55=100
x=100-55
x=45

((- 1) ^ 15x ^ 2) ^ 3 Calculation

-x^6

(120 / x + 3) × (X-2) = 120, how to calculate?

If we simplify the original formula, we can bring it to such a simplest equation, x-2-80 / x = 0
Using cross phase multiplication, we can get (x + 8 / x) (X-10 / x) = 0
That is, x + 8 / x = 0, or X-10 / x = 0,
When x + 8 / x = 0, both sides of the equation are multiplied by X, then x & sup2; + 8 = 0, does not hold, and is rounded off
When X-10 / x = 0, both sides of the equation are multiplied by X, then x & sup2; - 10 = 0, x = ± √ 10

High school mathematics, sum: 1 × 2 + 2 × 2 ^ 2 + 3 × 2 ^ 3 + + n · 2 ^ n =? Subtract by dislocation. Help~
Process! This is very important!

Do you know how to use the method of dislocation subtraction
Let t = 1 * 2 + 2 * 2 * 2 ^ 2 +... + n * 2 ^ n
So 2T = 1 * 2 ^ 2 + +(n-1)*2^n+n*2^(n+1)
Subtract t = n * 2 ^ (n + 1) - 2 - (2 ^ 2 + 2 ^ 3 +... + 2 ^ n)
=n*2^(n+1)-2-[2^(n+1)-4]
=(n-1)*2^(n+1)+2

Solution of equation 3x + y = 23

Dear pink sky, please forgive me if you are not satisfied
There are innumerable solutions to this equation. If y is an integer and X is also an integer, there are several answers: y equals two, x equals seven, y equals five, x equals six, y equals eight, x equals five, y equals eleven, x equals four, y equals fourteen, x equals three, y equals seventeen, x equals two, y equals twenty, x equals one, and a special one, y et al., 23, x equals 0,

My winter vacation zone translate 60 words

My Holiday
I like my holiday very much.Though it's very short,I can enjoy the Spring Festival.I can watch cartoon every day.I needn't go to school .Sometimes I can go to play with my friend outside.With the festival coming, I can play all the time.I can play video game with my brother.I am good at playing PC game.Then more and more relatives came to my home.We had dinner together.It 's so lively that I'm very happy.But I still have to do my homework.During the holiday,I learned a lot.I love my holiday.
My vacation
I like my holiday very much. Although it's very short, I can enjoy the Spring Festival. I can watch cartoons every day. I don't have to go to school. Sometimes, I can play outside of my friends. With the advent of the festival, I can control all the time. I can play video games with my brother. I'm good at playing computer games. Then, more and more relatives come to my home. We have dinner together
This is so vivid, I am very happy. However, I have to do my homework. During the holiday, I learned a lot. I love my holiday

The ratio of 4 / 3 to 0.5 is reduced to the simplest integer ratio (), and the ratio is ()

Reduce 4 / 3 to 0.5 to the simplest integer ratio (3:2) and ratio (1.5)
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Solve the equation; 20x + 10x (45-x) = 650

20x+10x(45-x)=650
20x+450-10x=650
10x+450=650
10x=650-450
10x=200
x=20

A cuboid has a surface area of 368c & nbsp; M2, a bottom area of 40C & nbsp; M2 and a bottom perimeter of 36cm______ ．

According to the analysis, 368-40 × 2 = 288 (square centimeter), 288 △ 36 = 8 (centimeter), 40 × 8 = 320 (cubic centimeter). Answer: the cuboid volume is 320 cubic centimeter. So the answer is: 320 cubic centimeter

Tana = 1 / 2.. Tan (a-b) = - 1 / 2 find the value of Tan (b-2a)?

tan(2a-b)=tan[a+(a-b)]=[tana+tan(a-b)]/[1-tanatan(a-b)]
=(1/2-2/5)/(1+1/2*2/5)
=(1/10)/(6/5)
=1/12
tan(b-2a)=-tan(2a-b)=-1/12