if y=7 when x=3, find x when y=24

You need more information as there are an infinite number of possible lines that pass through x = 3, y = 7 and then pass through y = 24.

thats really good!y is equal to 7 , and x is eqal to 3 , awesome , seriously , awesome!and i have to find something also in this , cool!thats what i love to do , find something! 

All that sounds GREAT , but whats the question btw? i mean whats the equation?