One minus one equals two against one

It's over with a knife

RELATED INFORMATIONS

1. It is known that a and B are integers, and 1 / 4 is equal to one part of a minus one part of B. the value of a and B is calculated
2. It is known that a multiplied by 2 / 7 = B multiplied by 2 / 3 [A.B is not equal to 0], then the simplest integer ratio of a and B is [] to []
3. Two thirds of a (not 0) is equal to four seventh of B. what is the simplest integer ratio of a to B?
4. If 1 / a plus 1 / b equals (a plus 4 / b), what is the value of a / B plus a / b
5. One of a and one of B is equal to one of 19, and a is greater than B. what is the value of a and B?
6. If A-B equals 1 / 2, what is the value of - 3 (a-b)
7. What's 11 and 13 5 minus 2 and 13 5
8. How much is 25 out of 33 plus 7 out of 22 minus 25 out of 33?
9. How many is 25 minus 1.4 divided by 7 / 9 Xiao Ming has 80 stamps, of which 3 / 4 are Chinese stamps and the rest are foreign stamps. How many more Chinese stamps than foreign stamps?
10. How much is 25 out of 24 minus 744 out of 24 and multiplying by 1 out of 5 How much is the sum of minus one to the second power minus one and one third plus minus twelve divided by six multiplied by minus three fourths to the third power.
11. 10 plus 10 equals 10, 10 minus 10 equals 10. Who am I Why gloves?
12. 10 plus 10 equals 10, 10 minus 10 equals 10
13. Guess: 10 plus 10 equals 10, 10 minus 10 equals 10 If you can guess, you're great! One of the professors couldn't guess~
14. Ten plus ten equals ten minus ten equals ten guess what's the daily necessities
15. If we know that a minus one part of a equals 10, then the square of (a plus one part of a) equals?
16. -How much is 1 minus 1 / 3
17. A number, minus 2 into 15, minus 5 into 20, minus 10 into 10, what is the number, to explain the reasons oh
18. Minus 2 equals 15, minus 5 equals 20, minus 10 equals 10. What's the number
19. How much is 4 out of 5 plus 7 out of 9 minus (1 out of 5 plus 7 out of 9), We should use a simple method to calculate,
20. What's 2 out of 5 plus 4 out of 7 minus 2 out of 5 plus 1 out of 7,