There is a three digit number whose ten digit number is equal to the sum of the number on the one digit and the number on the hundred digit; the number on the ten digit minus the number on the one digit There is a three digit number, the number on the ten digit is equal to the sum of the number on the one digit and the number on the hundred digit; the number on the ten digit minus the number on the one digit is equal to 2; after the number on the hundred digit is exchanged with the number on the one digit, the three digit number obtained is 99 larger than the original three digit number, and the three digit number (one yuan one power) can be calculated

There is a three digit number whose ten digit number is equal to the sum of the number on the one digit and the number on the hundred digit; the number on the ten digit minus the number on the one digit There is a three digit number, the number on the ten digit is equal to the sum of the number on the one digit and the number on the hundred digit; the number on the ten digit minus the number on the one digit is equal to 2; after the number on the hundred digit is exchanged with the number on the one digit, the three digit number obtained is 99 larger than the original three digit number, and the three digit number (one yuan one power) can be calculated

If the one digit number is x, then the ten digit number is (x + 2), and the hundred digit number is 2
100X+10（X+2）+2=200+10（X+2）+X+99
X=3,X+2=5
This three digit number is 253

The sum of each digit of a three digit number is 6, and the ten digit number is equal to the sum of the one digit number and the hundred digit number. If the one digit number and the hundred digit number are exchanged, the new number obtained is 99 less than the original number, and the three digit number can be obtained

Answer 231
Ten digits is the sum of one digit and one hundred digits
=>Ten digit * 2 = 6
=>Ten digits = 3
=>All the three digits that meet the appeal conditions are 132330231, while the new number is only 231, which is 99 less than the original number

If the sum of a three digit number, a single digit number and a hundred digit number is equal to a ten digit number, and the sum of a number in a hundred digit number is 7 times greater than the sum of a number in a single digit number and a ten digit number by 2, and the sum of a number in a single digit number, a ten digit number and a hundred digit number is one, then the three digit number is zero

The answer is 275. List the Trivariate linear equation: 1) x + y + Z = 142) y = x + Z3) 7x-y-z = 2 ------ substitute equation 2 into 1 and 3 to get the bivariate linear equation: 2x + 2Z = 146x-2z = 2 -------- simplify: 4) x + Z = 75) 3x-z = 1 -------- substitute equation 4 into 5 to get: 3 (7-z) - z = 1z = 5, so x = 2

The decimal part of 4 + radical 5 is a, and the decimal part of 4-radical 5 is 0. Find a + B

The decimal part of 4 + radical 5 is a, and the decimal part of 4-radical 5 is B. find a + B
First of all, 4 + radical 5 is an irrational number, and radical 5 is greater than radical 4, that is, greater than 2 and less than radical 9, that is, less than 3, so 4 + radical 5 is greater than 6 and less than 7, so a equals 4 + radical 5-6, that is, radical 5-2. Similarly, 4-radical 5 is greater than 1 and less than 2, so B equals 4-radical 5-1, that is, 3-radical 5, so a + B = 1