A shopping mall to promote sales, the provisions: buy a TV or One day, the mall sold 100 TV sets and refrigerators, including 75 TV sets, 50 microwave ovens and 18 Electric irons. Q: how many microwave ovens and electric irons did the mall give away that day? Trouble you, thank you ~ to have formula, process, urgent~~^_^

A shopping mall to promote sales, the provisions: buy a TV or One day, the mall sold 100 TV sets and refrigerators, including 75 TV sets, 50 microwave ovens and 18 Electric irons. Q: how many microwave ovens and electric irons did the mall give away that day? Trouble you, thank you ~ to have formula, process, urgent~~^_^

Among the 75 TV sets sold, 50 microwave ovens were sent as gifts for TV sets, and 75-50 = 25 electric irons were sent as gifts for TV sets
The number of refrigerators sold is 100-75 = 25, the number of electric irons sent as freebies for refrigerators is 18, and the number of microwave ovens sent as freebies for refrigerators is 25-18 = 7
There were 57 microwave ovens (50 + 7) and 43 electric irons (25 + 18)

Solution equation (- 4) ^ 8 × (1 + 2x) = (- 2) ^ 15 × (3x-1)
Where X of 1 + 2x is the letter 3x-1, and X is also the letter

（－4）×8×（1＋2x）＝（－2）×15×（3x－1）
16（1＋2x）＝15（3x－1）
16+32x=45x-15
13x=31
x=31/13

Shopping promotion, 20% discount on TV sales, after the price reduction, the price of each TV is 300 yuan cheaper than the original price

The original price is 1500. Suppose X. 20% discount is actually equivalent to the original price of 0.8. The real bargain is the 0.2 part, so it's 0.2x = 300. The original price is 1500~

How many meters is a mile

A kilometer is 1000 meters, and a mile is 500 meters

Solving equation 1 / 2x - (2 / 5 × 15 / 8) = 12

1/2X-0.75=12
X=（12+0.75）÷0.5
X=12.75×2
X=25.5
therefore
The result is 25.5

During the promotion period of a shopping mall, it is stipulated that all goods in the shopping mall are sold at 80% of the price. At the same time, when customers spend a certain amount of money in the shopping mall, they can get the corresponding amount of lottery tickets according to the following scheme. (lottery shopping no longer enjoys preferential treatment) the range of consumption amount x (yuan) 200 ≤ x < 400 ≤ x < 500 ≤ x < 700 The amount of lottery ticket (yuan) 30 60 100 Mr. Hu selected the goods priced at 450 yuan in the shopping mall. According to the above promotion method, he can get______ The amount of lottery ticket is RMB

450 × 80% = 360 yuan; 200 ≤ 360 ＜ 400; so Mr. Hu can only get 30 yuan lottery. Answer: he can get 30 yuan lottery. So the answer is: 30

How many square meters is 2.4 cents

1 mu = 10 minutes ≈ 666.667 square meters
2.4 points = 666.667 △ 10x2.4 ≈ 160 (M2)

To solve the equation: (1-4 / 1) x △ 5 / 1 = 8 / 5, 3 / 2X-4 / 3 = 9 / 2, 4 / 3x + 2 / 2x = 12 / 1 (all process

(1-1/4)x÷(1/5)=5/8(3/4)x=25/8x=(25/8)×(4/3)x=25/6

How much land is 348.4 square meters

1 mu = 10 points = 666.7 square meters
348.4 square meters = 348.4 / 666.7 = 0.52 Mu = 5.2 points

(x-0.16) divided by 0.3 = 1.8 (solving equation)

x-0.16=6
x=6.16