Equation (2x-1) ^ 2 + 11 = 4x (x + 2) The solution of the equation (2x-1) & sup2; + 11 = 4x (x + 2) is. OK, I'll add points

Equation (2x-1) ^ 2 + 11 = 4x (x + 2) The solution of the equation (2x-1) & sup2; + 11 = 4x (x + 2) is. OK, I'll add points

（2x-1）²+11=4x（x+2）
4x²-4x+1+11=4x²+8x
12x=12
x=1

The solution of equation 13 − 2x11 − 2x + 17 − 2x15 − 2x = 19 − 2x17 − 2x + 11 − 2x9 − 2x is X=______ ．

The original equation is reduced to (1 + 211 − 2x) + (1 + 215 − 2x) = (1 + 217 − 2x) + (1 + 29 − 2x), and 111 − 2x-19 − 2x = 117 − 2x-115 − 2x, − 2 (11 − 2x) (9 − 2x) = − 2 (17 − 2x) (15 − 2x), (11-2x) (9-2x) = (17-2x) (15-2x). Solving the equation, x = 132

(6-x) (2x / 2) = 8
process

(6-x)(2x/2)=8
12x-16=2x²
2x²-12x+16=0
x²-6x+8=0
（x-2）（x-4）=0
X = 0 or x = 4

Such as piecewise function, f (x) = 1 (x is greater than or equal to o) and - 1 (x)

1 x+1>=0 x>=-1 x+(x+1)f(x+1)

After a shopping mall bought two kinds of clothing, they all increased the price by 40%. During the Spring Festival, the shopping mall made a preferential promotion and decided to sell them at 20% and 10% discount of the price. A customer paid 182 yuan for the two kinds of clothing, and the sum of the two kinds of clothing price was 210 yuan?

If the price of a kind of clothing is x yuan, then the price is x1.4 yuan according to the title; if the price of B kind of clothing is y yuan, then the price is y1.4 yuan according to the title, then according to the title equation system, we get x + y = 21080% x + 90% y = 182, and the solution is x = 70Y = 140

The number of a is 5 times that of B, and the number of B is 1 / 5 of that of a () 2, because 1A / 2 = 1B / 3 (a)
The number of a is 5 times that of B, and the number of B is 1 / 5 of a () 2. Because 1A / 2 = 1B / 3 (a, B are not 0), so a is greater than B. () 3. If a multiplied by B is equal to 1, then a and B are reciprocal to each other. () 4. For two squares with edge length ratio of 2:3, their volume ratio is 2:3 ()

Right, right, wrong

From city a to city B, it took four hours for buses and five hours for trucks

Hello
From city a to city B, it took four hours for buses and five hours for trucks. The speed ratio of buses to trucks is (5:4)
Speed ratio of passenger car and freight car driving:
1/4 ：1/5
=5 ：4

A few plus two thirds is five sixths
One minus five out of twelve is almost zero

(1) One sixth
(2) Seven out of twelve

A and B start from ab at the same time, and meet 75 km away from a for the first time. After meeting, the two vehicles continue to move forward and return to their destination immediately
For the second time, we met 55 kilometers away from B. how many kilometers away is ab?

75×3-55
=225-55
=170 km

It is known that the solution of the equation MX + 2 = 2m-2x about X satisfies ix-2 / 1I = 0, and the value of M is obtained

I = 0 from 1 / 2 of ix-2
We get x = 1 / 2
Take x = 1 / 2 into the equation
mx+2=2m-2x
So m = 2