One seventh of five meters is equal to () of one meter

One seventh of five meters is equal to () of one meter

One seventh of five meters is equal to five seventh of one meter

A fraction, a molecule plus 4 becomes one seventh, and a molecule multiplied by 4 becomes three seventh. What's the fraction? It can't be solved by binary linear equation

Suppose that the denominator of the original fraction is 7 (x + 4)
4x:7（x+4)=3:7
28x=21x+84
28x-21x=84
7x=84
x=12
Denominator: 7 (12 + 4) = 112
So, the original score is: 12 / 112

A number, two thirds of it, half of it, one seventh of it, all add up to 33, then the number is 33______ ．

Let this number be X. from the meaning of the question, we can get: 23x + 12x + 17x = 33 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5542x = 33 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 1265 A: this number is 1265. So the answer is: 1265