How to calculate 4 (2x-1) - 3 (5x + 2) = 3 (2-x)?

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• 1. Simplification: [(x ^ 2 + 18x + 72) / (x + 12) - (x ^ 2 + 5x-6) / (x-1)] · (x ^ 3-2x ^ 2-x + 1)
• 2. X + y + Z = 35 2x-y = 5 1 / 3 y = 1 / 2 Z
• 3. Solve the equation x + 1 / X-1 + 1-2x / 2x = 0
• 4. Solving the equation: 2x-1 / 3-10x + 1 / 12 = 2x + 1 / 4 Will increase the reward of wealth
• 5. 3 × 2 + 2x = 12 solution equation
• 6. When doing polynomial multiplication, Xiao Li found that: by using the law of distribution of multiplication to expand the multiplication of polynomials and polynomials, the phenomenon of missing terms may appear after merging the similar terms. Now there is a quadratic trinomial X & # 178; + 2x + 3, which is multiplied by a binomial ax + B, the product does not appear a quadratic term, and the coefficient of the quadratic term is 1, so we can find the value of a and B Why is there no primary term and why is the coefficient of the secondary term 1
• 7. 2﹙10-0.5x﹚=-﹙1.5x-2﹚=?4x+3﹙2x-3﹚=12-﹙x+4）=?
• 8. If 2F (x) - f (1 / 3) = 3x + 2, find the analytic expression of F (x)
• 9. Find the range of function y = 3x & # 178; + (1 / 2x & # 178;)
• 10. Given the function f (x) = 2mx2-2 (4-m) x + 1, G (x) = MX, if at least one of F (x) and G (x) is positive for any real number x, then the value range of real number m is () A. （0，2）B. （0，8）C. （2，8）D. （-∞，0）
• 11. 5x = 3Y, X-Y = 4 write the process of equations, 1 / 2x = - 2 / 3Y, 2x + y = 7 write the process of equations
• 12. 5x-7 / 6 + 1 = 2x-1 / 4
• 13. 2x-2 plus 5 / 5 of X-1,
• 14. 5 of 2x 10 5 minus 3 of x 10 4 = 0
• 15. One minus two by three equals x minus one by two
• 16. The total cost of two pieces of clothing is 500 yuan. In order to make a profit, the store owner decides to price the clothing at 50% of the profit and the clothing at 40% of the profit. In actual sales, at the request of customers, the two pieces of clothing are sold at a 10% discount. In this way, the store makes a total profit of 157 yuan. How much is the cost of the two pieces of clothing?
• 17. A store bought 100 a-clock products and 80 B-type products from the wholesale Department of a company. The total cost was 2800 yuan. When the store retailed, the price of each A-type product was increased by 15%, and that of each B-type product was increased by 10%. After all the products were sold, the total income was 3140 yuan. How much was the purchase price of a and B-type products?
• 18. The problem of linear equation with one variable on the first day of junior high school··· When a bicycle is moving at a fixed speed in front of it, there is a car to catch up with. If the speed is 30km / h, it will catch up in one hour; if the speed is 35km / h, it will catch up in 40 minutes to find the bicycle speed
• 19. The problem of "practically solving the equation of one variable and one degree" in grade one of junior high school A shopping mall sells two goods at 99 yuan. One loses 10% and the other makes 10% profit. Is it a loss or a profit for the total price of two goods
• 20. How to solve the engineering problem of linear equation of one variable, encounter problem and so on? In the first semester of junior high school, I taught the linear equation of one variable in mathematics. When I encounter problems like this, I can't find the equivalent relation. What should I do? It's better to send all kinds of formulas of various problems in the second semester of junior high school,