3 19 numerator, the denominator plus the same number, about the fraction to get 5 7, then what is th

Because the numerator and denominator of the fraction are added to the same number, the difference between the numerator and the denominator of the fraction does not change.

Denominator: (19-3) (7-5) x7=56 or; (19-3)/(1-5/7)=56

Numerator: (19-3) (7-5)x5=40 56x5 7=40 Then the added number is: 56-19=37 or 40-3=373 The denominator of 19 is 16 more than the numerator, and the denominator of 5 7 is 2 more than the numerator.

Because the difference between the numerator and the denominator of the fraction does not change, the numerator and denominator of 5 7 are enlarged at the same time (19-3) (7-5) = 8 times. Then the 5 7 after the covenant is before the covenant.

5 7 = (5x8) (7x8) = 40 56 then the added number is; 40-3=37 or 56-19=37

Since the numerator denominator of 3 19 is added to the same number, and the difference between 3 and 19 is 16, then the difference between the numerator and denominator of this fraction before the reduction should also be 16. Now after the approximation of 5 7, and the difference between 5 and 7 is only 2, to make their difference 16, the numerator and denominator should be expanded by 8 times, so that we get 40 56, so we get the number added at the same time is 56-19=37 (40-3=37). So the added number is 37!

If the fraction is 37 points, the numerator and denominator of 53 next to the orange, and the same number is added, the fraction obtained is true, the fraction is 5/7 of seven+, and the number of the royal belt is how much is the number of the circle, that is to say, 70/50 37, it is -7/5, and the topic is that he calculates.

Let the number added by the yardstick be x, then according to the meaning of the question, there is (53+x) (37+x)=7 5, and the elevation of this square can be solved to obtain x=6 2=3. From this, it can be seen that the number added is equal to mold 3.

It is equivalent to asking 29+x=7y, 5+x=9y, and finding x?

then 29*9+9x=5*7+7x

So tease stool x=-113

To verify, (29-113) Shanmai Brigade (5-113) = (84) (108) with good = 7 9

The arithmetic late spike method is the same.

31-9) (7-5) = 11

The number to be added is 46 Dan Sakura.

Let this number be m, then there is (9 m) (31 m) 5 7Sixth-grade students should know that two inner terms are equal to two outer terms. The hereditary is counted as (9 m) 7 (31 m) 5Solution: m 46

Solution: (31 + number) (43 + number) = 4 5

There are 5 (31 + numbers) = 4 (43 + numbers).

155 + 5 number = 172 + 4 number.

5 numbers - 4 numbers = 172-155

Number = 17 i.e. this number is 17

A fraction of 17 49 numerators, the denominator is added to the same number, about 9 13, what is the addition of this number?

Solution: Let the number added be x

17+x）/（49+x）=9/13

13（17+x）=9（49+x）

221+13x=441+9x

13x-9x=441-221

4x=220

x=55

This kind of question is done by, well, and in turn take that 9 13 a certain number, and then make 9 + this number equal to 1713 and this number is equal to the one that is a multiple of 49. So the medicine is fit, so I.

A fraction of 17 49 numerator, the denominator is added to the same number, after the fraction is 9 13, the number added is (55), 49*9-17*13) (13-9).

The numerator and denominator differ by 34-7=27

The ratio of the numerator and denominator is 5:14

So the molecule is 27 5 (14-5) = 15

So this number is 8

Let the number added be x

7+x)/(34+x)=5/14

5(34+x)=14(7+x)

170+5x=98+14x

9x=72x=8 adds the number 8