Solve the equation: 3x = 2x-14 Hurry!

Solve the equation: 3x = 2x-14 Hurry!

3x/5=2x-14
-7x/5=-14
x=10

(2x-25) / (3x-48) = 3 / 4 solution equation
I'm in the fifth grade. I'd better make it clear, or I can't understand it! If I work hard,

(2x-25)/(3x-48)=3/4
3(3x-48)=4(2x-25)
9x-144=8x-100
9x-8x=144-100
x=44

27x ^ - 18x + 3 4 (x-3) ^ - x (x-3) (x ^ - 2x) ^ + 2 (x ^ - 2x) + 1 quick. Everyone help
27x^-18x+3
4（x-3）^-x（x-3）
(x^-2X)^+2（X^-2X)+1
Fast, factorization

（1）27x²-18x+3=3（3x-1）²
（2）4（x-3）²-x（x-3）=（x-3）[4×（x-3）-x]=3（x-3）（x-4）
（3）(x^-2X)²+2（X²-2X)+1=[（X²-2X+1)]²=（x-1）^4

What is the simple algorithm of 24.5 times 7.4 + 2.6 times 2.6 times 24.5
Both the formula and the result are written in urgent need
24.5 times 7.4 + 2.6 times 2.6 times 24.5

24.5 by 7.4 + 2.6 by 2.6 by 24.5
=24.5*（7.4+2.6）
=24.5*10
=245

Xiaogang wants to buy a set of "100000 whys". There are 8 volumes of this set, and the unit price of each volume is 10 yuan. During the 11th National Day, Xinhua and friendship bookstores have sales promotion
Activities, Xinhua Bookstore all 20% discount, art point buy three get one free, where he buy cheaper?

Xinhua: 10x80% = 64 (yuan)
Friendship: buy eight books, save 20 yuan, and buy two books, a total of (8x8-20) + 10x2 = 64 yuan

What do you call a 16-year-old girl, 20, 30, 40, 50, 60, 70 and over 80?
It's not a title

Jasper age: 16 years old
Swaddling: newborn
Childhood, total angle, chuiyu: childhood
The year of Jinchai: 12 years old
Year of cardamom: 13 years old
Year of hairpin: female 15 years old
Jasper age: 16 years old
Taoli Nianhua: 20 years old
Hua xinnianhua: female, 24 years old
Weak crown year: male 20 years old
30 years old: Male
Age in doubt: male, 40
Year of life: 50 years old man
60 years old man
Old age: male 70
Xi Shou: male, 77
80 years old
Mishou: male, 88
Age of chub mackerel: 90 years old
Bai Shou: male, 99 years old
Year of the summer: Men's 100
Chashou: male, 108 years old

In a subtraction formula, the sum of the subtracted, the subtracted and the difference is 120, and the subtracted is 2 / 3 of the difference, then the difference is ()

120/2*(1+2/3)=36

Xiao Hua corrected his study purpose and attitude

Correct attitude, clear purpose. Can't correct purpose. Understand?

Product name a, B, C, unit cost is 15,20,30 respectively. Total cost of enterprise a is 210030001500. Enterprise B is 325515001500
This is a table, statistical, Q: compare which enterprise's total average cost is high, and analyze the reasons

A: (2100 + 3000 + 1500) / (2100 / 15 + 3000 / 20 + 1500 / 30) = 6600 / (140 + 150 + 50) = 6600 / 340 = 19.41
B: (3255 + 1500 + 1500) / (3255 / 15 + 1500 / 20 + 1500 / 30) = 6255 / (217 + 75 + 50) = 6255 / 342 = 18.29
The total income of a is 345 more than that of B,
The unit cost is 30 yuan;
The unit cost of 20 yuan is 75 more than that of B * 20 = 1500 yuan;
The unit cost of 15 yuan is - 77 less than that of B * 15 = - 1155 yuan;
The total difference of the three unit costs is 0 + 1500-1155 = 345;

20 times 100% equals

20×100%=20×1=20