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2. Solve the equation. 3 / 4x + x = 42
7/4X=42
X=42*（4/7）
X=24
The price of a refrigerator is 2100 yuan after 18 years of price reduction______ Yuan
2100 (1-18) = 2100 (78) = 2400 (yuan) a: the original price is 2400 yuan
Solve the equation (16-2x) × (24-4x) △ 2 = 48
(16-2x) × (24-4x) = 96 separate the two left sides of the equation completely, and then shift the term x to be equal to
one hundred and forty-seven-fifty-seconds
A washing machine, the original price of 3000 yuan, now cut price 215. Now how much is the price
3000 × (1-215), = 3000 × 1315, = 2600 yuan; answer: the current price is 2600 yuan
4x+6=24 2x+1.5*2=6
4x+6=24
4x=24-6
4x=18
x=18÷4
x=4.5
2x+1.5*2=6
2x=6-1.5*2
2x=3
x=3÷2
x=1.5
After a 35% price reduction, the current price of a refrigerator is 1560 yuan. How much is the original price? How much is it cheaper?
（1）：1-35%=65%
1560 △ 65% = 2400 yuan
(2) : 2400-1560 = 840 yuan
Solve equation 1.4x = 7
1.4X=7
1.4x = 7 (obtained by dividing both sides of the equation by 1.4)
1.4x △ 1.4 = 7 △ 1.4 (calculated)
X=5
Weng Jinwen answers for you,
If it helps you,
If you have any other questions,
A group decided to seize the rural market with the help of "home appliances going to the countryside activity". A refrigerator priced at 3200 yuan per set was given preferential promotion,
If the price of each unit is reduced by X%, it is estimated that it can sell 800000 units in the whole year. (1) what is the price to maximize the total annual sales?
(2) According to the relevant policies, farmers can enjoy 13% of the sales price of government subsidies when they buy household appliances. Under the condition of (1), how much should farmers actually pay for such a refrigerator?
If you express the total amount of sales f (x) in X, the result is f (x) = 3200 (1-x%) (80 + x)
=32(8000-20x-x*x)
=32[8100-(x-10)*(x-10)]
So the result is that when x is 10, the maximum total sales amount is 32 * 8100 = 2592 million yuan
The farmers should pay: 3200 * (1-10%) * (1-13%) = 2505.6 yuan
20x divided by 9 + 32 = 4x
20x=36x-288
16x=288
x=18
A home appliance store held a sales promotion. A refrigerator used to be 3200 yuan per unit, but now it is sold at 75% discount. What's the current price of each unit?
3200 yuan × 0.75 = 2400 yuan. The current price is 2400 yuan per set
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