In order to promote the sales of a brand of air conditioner, a shop decided to buy the air conditioner on New Year's day in 2004. It can pay in two installments, and pay a sum of money in advance. The rest and its interest (annual interest rate is 5.6%) will be paid off on New year's day in 2005. The price of the air conditioner is 8224 yuan per unit. If the two payments are the same, how much yuan should be paid each time?

Suppose X Yuan is payable each time, according to the meaning of the question: (8224-x) + (8224-x) × 5.6% = x, the solution is: x = 4224, a: 4224 yuan is payable each time

Three equations, I hope the answer can explain to me
(1) 3（x+3.5）=30
(2) (6-x)/2=2
(3) (x+0.8)*7=8.4
I hope that the respondent can explain to me, only one of them, so that others will understand

(1) 3（x+3.5）=30
3x+10.5=30
3x=30-10.5
3x=19.5
x=6.5
(2) (6-x)/2=2
6-x=4
x=6-4
x=2
(3) (x+0.8)×7=8.4
x+0.8=8.4÷7
x+0.8=1.2
x=1.2-0.8
x=0.4

I can't solve one equation problem,
A company goes to the mall to buy TV. A 1500 yuan / set, B 2100 yuan / set, C 2500 yuan / set. If it costs 90000 yuan to buy three kinds of TV, please design the plan

Suppose a, B, C, then 1500A + 2100B + 2500C = 90000 (1) a + B + C = 50 (2), that is 15A + 21b + 25C = 900 = = > 25C = 900-21b-15a = 3 * (300-7b-5a), then 25C = 900 - 21 * 50 + 21C + 21a - 15A = = > 4C = 6A - 1

1 of 10 * 11 + 1 of 11 * 12 +... + 1 of 19 * 20

1/(10*11)+1/(11*12)+...+1/(19*20)
=1/10-1/11+1/11-1/12+.+1/19-1/20
=1/10-1/20
=(2-1)/20
=1/20

If the line L: x = my + 2 is tangent to the square of the circle M: x + 2x + y + 2Y = 0, what is the value of M?

Straight line: x-my-2 = 0
Circle: X & # 178; + 2x + Y & # 178; + 2Y = 0
(x+1)²+(y+1)²=2
The center of the circle is (- 1, - 1) and the radius is √ 2
Because it's tangent
The distance from the center of a circle to a straight line is equal to the radius
|-1+m-2|/√(1+m²)=√2
|m-3|=√(2+2m²)
m²-6m+9=2+2m²
m²+6m-7=0
(m+7)(m-1)=0
M = - 7 or M = 1

What is Four Thirds minus one eighth plus seven twelfth? (process)
Please, can you give me the process

4/3-1/8+7/12= 32/24-3/24+14/24= (32-3+14)/24=15/24

Y = 2x & # 178; + 4x-2 is transformed into the form of y = (X-H) &# 178; + K: y=______

Y = 2x & # 178; + 4x-2 becomes y = 2 (x + 1) &# 178; - 4

What is 72.6 divided by 3 minus 25.8 plus 17.4?

72.6÷3-25.8+17.4
=24.2-25.8+17.4
=-1.6+17.4
=15.8

If a = - 1, then - (- | a |) =? 3

1. Because | 2x-1 | = 0, so | 2x-1 | = 0, so x = 1 / 2
2. Because a = - 1, then - (- |a|) = |a| = 1
Because even negative numbers are positive numbers

Three equations, I hope the answer can explain to me (1) 3（x+3.5）=30 (2) (6-x)/2=2 (3) (x+0.8)*7=8.4 I hope that the respondent can explain to me, only one of them, so that others will understand

I can't solve one equation problem, A company goes to the mall to buy TV. A 1500 yuan / set, B 2100 yuan / set, C 2500 yuan / set. If it costs 90000 yuan to buy three kinds of TV, please design the plan