Question

Variable y varies directly with variable x, and y = 4 when x = 7.



What is the value of x when y = 12?
I don't know, How can I get the answer?

Answer 1

If i am interpretting the problem properly x=y

Answer 2

okay like before y=kx since it is directly varying now put values of y and x to find k which is constant of proportionality

4=k7
4/7=k

now y=4/7x
12=4/7x
x=21 ans

Answer 3

^

Answer 4

Thank you so much, do you mind if I write this down for notes?

Answer 5

of course use it in anyway you want.