For a piece of wire, three fifths of a meter is used for the first time, and then the rest is two tenths of a meter less than the one used A vegetable base, in which 5% of 1 kind of cabbage, 10% of 3 kinds of cucumber, the rest of the beans?

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• 1. Three fifths of the length of a piece of rope is used for the first time, and the rest is one-half of the length used. How long is the length of this piece of rope?
• 2. Two ropes of the same length, one used 1 / 3 of the rope, the other used 1 / 3 of the rope, compared with the remaining wire
• 3. There is a piece of iron wire. For the first time, more than half of it is used. For the second time, the remaining half is less than 1 meter. At this time, there are still 3.5 meters left. How long is the original length of the iron wire?
• 4. There is a piece of iron wire. The first time you use half of it is less than 1 meter, and the second time you use the remaining half is more than 1 meter. At this time, there are still 3 meters left. How long was the iron wire originally? Using equation
• 5. 3 [2 (1-2x) - 1] - 1 = 5 two methods are used to solve the equation
• 6. 2 (2x - 1) - 4 (x + 1) = 3 (x + 1) - 5 (2x - 1)
• 7. Try two methods to solve the equation 2 (2x-1) - 4 (x + 1) = 3 (x + 1) - 5 (2x-1) There must be two
• 8. It is known that the solution of the equation 1 / 2 (1-x) = 1 + K and the solution of the equation 4 / 3 (3x + 2) = 10 / K-2 / 3 (x-1) about X are opposite to each other, and the value of K can be obtained
• 9. It is known that the solution of the equation 2 / 1 (1-x) = 1 + K and the solution of the equation 4 / 3 (x-1) - 5 / 2 (3x + 2) = 10 / K-2 / 3 (x-1) are opposite to each other, so the value of K can be obtained
• 10. It is known that the sum of the solutions of the equation 1 / 2 (1-x) = 1 + K and 3 / 4 (x-1) - 2 / 5 (3x + 2) = K / 10-3 / 2 (x-1) is 0 It is known that the sum of the solution of the equation 1 / 2 (1-x) = 1 + K and the solution of 3 / 4 (x-1) - 3 / 5 (3x + 2) = 1 / 10k-3 / 2 (x-1) about X is 0. To find the value of K, we need the whole analytical process of the equation
• 11. There is a 20 meter long rope, which is divided into four meter long segments. How many segments do you need?
• 12. A three fifths long rope is cut into the same six segments, each segment is () meters long, and each segment is a fraction of the total length
• 13. I cut a rope four fifths of a meter long into equal sections for three times. How many meters is the average length of each section?
• 14. How many sections can a 5-meter rope be cut into a quarter meter long section? How many parts of a 5-meter rope are three sections?
• 15. How many segments can you cut a 27 meter rope into three fifths of a meter? How long is each segment?
• 16. For a rope, two fifths of the total length will be used for the first time, and the remaining two fifths will be used for the second time. There are still 180 meters left. How long is the rope originally?
• 17. For a rope, two fifths of the total length will be cut off in the first time, and the remaining three fourths will be subtracted in the second time. A total of 17 meters will be cut off in the two times. How many meters is the total length of this rope? It's urgent!
• 18. The first time a rope is used up to 1 / 3 of its total length, and the second time it is used up to two fifths of its total length. At this time, the rope is still 16 meters long. How many meters is the rope?
• 19. For a rope, cut two-thirds of the meter in the first time and two fifths of the meter in the second time. There is still one fourth of the meter left. How long is the rope?
• 20. "Two fifths of the total length of a rope is used for the first time, and the remaining quarter is used for the second time. There are 27 meters left. How long is this rope?