1 / 4 + 2x = 1 / 2 = 1 / 2 2 / 3x-1 / 5x = 1 (1-3 / 8) x = 10 if the answer is correct, add 100. If it is correct, add 100 And 70 * (1 + 1 / 2)

RELATED INFORMATIONS

• 1. In the department store, every pair of shoes with the original price of 1600 yuan is unsalable. The company decided to reduce the price by & nbsp; n%, but still can't sell them. Finally, the price was reduced by & nbsp; n% at the reduced price. As a result, the price of each pair of shoes was 1024 yuan=______ ．
• 2. Using the equation, A travels five or 120 meters per minute, B 80 meters per minute. They start from store a to store B at the same time. When B arrives at store B, a has stayed in store B for two minutes. How many meters is the distance from store a to store B?
• 3. A mathematical problem (with equations) There are two barrels of oil. The quality of barrel a is five times that of barrel B. If a pours 24 kg of oil into barrel B, the two barrels will be equally heavy?
• 4. A and B leave from the East and West. After 8 o'clock, the two vehicles meet at 32km from the midpoint. A runs 48km per hour, B runs 48km per hour? Lie equation: 4.5 times of the decimal is 22.5 times more than 3 times of the decimal? What's the quotient of 25 plus two fifths and dividing by seven ninths?
• 5. A fast horse travels 240 Li a day, and a slow horse 150 Li a day. The slow horse goes 12 days first. How many days can the fast horse catch up with the slow horse?
• 6. How to calculate 5.3 * 10.1
• 7. How to calculate 10.1 times 88?
• 8. How to calculate 1 / 10-5 + 6 / 5
• 9. (10-1 / 25) / 99.6
• 10. A simple mathematical calculation 13 out of 49 by 21 plus 13 out of 49 by 28
• 11. Three math problems about equation in grade six &To solve the equations {- x + 2Y + 3Z = 12 & nbsp; {2x-2y + 5Z = 13 & nbsp; {3x + 2Y + Z = 10 & nbsp; Solve the system of equations {2 (x + y) - 3 (X-Y) = 1 & nbsp; {6 (x + y) + 7 (X-Y) = 51 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; remove the brackets and make it easier Given that the system of equations {2x-y = 0 & nbsp; {2x + y = m and the system of equations {X-Y = 5 & nbsp; {2x-y = n-1 have a set of common solutions, the values of M and N are obtained   ,,
• 12. 1. After a certain kind of corn was changed to high-quality coarse cereals, the per capita income of farmers this year increased by 20% compared with that of last year. The per capita income of farmers this year was 1.5 times less than that of last year by 1200 yuan. What was the per capita income of farmers in this township last year? 2. Saw a 100cm long wooden stick into two sections, so that the length of one section is 5cm less than that of the other section, which position of the stick should be sawed?
• 13. 0.45*198 5.4*102 1.83*2.6+1.83*7.4 1.25*2.5*3.2 solve equations: 3X+12.5*2=85 （X-8）/2.4=12 8（X-7）=24 34X-5X+48=106 Elementary school simple calculation and solving equation step by step` Elementary school simple calculation and solving equation step by step` Elementary school simple calculation and solving equation step by step` Elementary school simple calculation and solving equation step by step`
• 14. Simple calculation and solution equation Simple calculation: 29 / 47 × 28 + 19 / 47 × 29 solution: 3.7x + 4.4 = 5.9x-2.2
• 15. Primary school score plus and minus fifth grade simple solution equation, an X Oh, each 50, who has? For example: x-3 / 10 = 1 / 5, 1 / 8 + 8 / 15 + 7 / 8 + 3 / 15, help!
• 16. Primary school sixth grade off formula calculation. I give 30 wealth (1) 75% of 0.25 * 31 + 49% of 31% (2) 3% of 4 * 4 + 75% * 7-0.75 (3) 13.6 * 40% - 3.6 * 2 / 5
• 17. Simple solution equation for export calculation
• 18. Solve the equation, calculate, simplify and evaluate 30 times each,
• 19. 120 simple calculation, who has? 120 simple equations. 120 drag calculation Please
• 20. Ask 200 people's education press sixth grade volume 1 simple calculation, We need to use five laws (multiplication allocation rate, multiplication combination law, multiplication exchange law) To score, the calculation must be simple