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The weight ratio of grain stored in warehouse A and warehouse B is 8:7. If 1 / 4 of the grain is transported from warehouse A and 80 tons are transported into warehouse B, then the grain stored in warehouse B is 17 tons more than that in warehouse A, and how many tons is the original grain stored in warehouse a? Party B transported 8 tons
A: 8x tons B: 7x tons
If Party A transports 1 / 4, there will be 3 / 4 = 6x tons left
7X+8-6X=17
X+8=17
X=17-8
X=9
A: 8x = 72
Let a: B be 8x: 7x
If a transports 1 / 4, then 2x remains, so (7x + 8) - 2x = 1, the solution is x = 1.61.6 times 8 = 12.8
Make your own equations, it's easy!
Find the rule 2,3,5,9,17, (), ()
Analysis: first of all, the difference between two is 1,2,4,8, which is an equal ratio sequence
Then, we can give the recurrence formula of this sequence is a (n + 1) = 2An - 1
So the following numbers are 33, 65
33 65
The last number = the first number * 2-1, so it should be 33,65
*2-1
17*2-1=33
33*2-1=65
33,65
33 and 65
The rule is 2 ^ (n-1) + 1
2，3，5，9，17，（ 33），（ 65)
Poor: the order is: 1, 2, 4, 8, 16, 32. Question: do you know 1, 2, 4, 7, 11 (), 22?
Xiao Ming read a story book. On the first day, he read 16 pages of the whole book. On the second day, he read 24 pages. On the third day, the number of pages he read was 150% of the total number of the previous two days. At this time, there were still 14 pages of the whole book that he did not read___ Page
(24 + 24 × 150%) / (1-16-16 × 150% - 14) = (24 + 24 × 1.5) / (1-16-14-14) = (24 + 36) / (56-12) = 60 / 13 = 180 (pages) a: there are 180 pages in the whole book, so the answer is: 180
It takes 5 hours for a bus and 7 hours for a truck to complete the whole journey. When the bus completes half of the whole journey, how many parts of the whole journey does the truck travel?
12 △ 15 = 12 × 51 = 52 (hours); 17 × 52 = 514; answer: the truck only runs 514 times in the whole journey
The weight ratio of grain stored in a and B warehouses is 8:7. If 1 / 4 grain is transported from a warehouse,
If warehouse B carries 7 tons, the weight ratio of warehouse A and warehouse B is 9:7. How many tons of grain are stored in warehouse A and warehouse B?
The weight ratio of grain stored in warehouse A and warehouse B is 8:7. If 1-4 tons are transported from warehouse A and 7 tons are transported from warehouse B, then
Suppose that the weight of grain stored in two warehouses A and B is 8x and 7x respectively
(1-1/4)*8x :7x-7 = 9 :7
X=3
The weight of grain stored in a and B warehouses is 24 and 21 respectively
Let a be x, then B be 7 / 8x
x*（1-1/4）：（7/8x-7）=9：7
The solution is x = 24
Find the rules 3, 5, 9, 17___ ,___ ,129,.
3+2=5
5+4=9
9+8=17
17+16=33
33+32=65
65+64=129
Filling 33,65
Xiao Ming had a story book. He read 1 / 6 of the whole book on the first day, 32 pages on the second day, and 3 / 2 of the total pages on the third day
A quarter of the book is not read. How many pages is the story book? Write the formula
Suppose the whole book consists of X pages, then X-1 / 6x-1 / 4x-32 = (1 / 6x + 32) * 2 / 3
The solution is x = 240
Let x pages 1 / 6x + 32 + (1 / 6x + 32) * 3 / 2 = 3 / 4x
We can get x = 240
1/6X32X3/2
It takes 5 hours for a bus and 7 hours for a truck to complete the whole journey. When the bus completes half of the whole journey, how many parts of the whole journey does the truck travel?
12 △ 15 = 12 × 51 = 52 (hours); 17 × 52 = 514; answer: the truck only runs 514 times in the whole journey
The weight ratio of grain stored in warehouse A and warehouse B is 8:7. If 14 tons of grain are transported out of warehouse A and 8 tons are transported in warehouse B, then the grain stored in warehouse B is 15 tons more than that in warehouse A, and how many tons of grain was stored in warehouse a?
The original warehouse is & nbsp; & nbsp; = 788, + 348; & nbsp; + 348; & nbsp; + 348; & nbsp; - 788
Find the law, 1 / 3, - 3 / 5, 3 / 9, - 4 / 17, 5 / 33,
The molecular law is 1, - 3,3, - 4,5, - 6,6, - 7,8
The rule of denominator is 5 = 3 * 2-1, which is 2 times of the previous denominator minus 1!
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