Question

If 3x = 4y and 4y = 21z, what is the value of x in terms of z? *

Answer 1

x = 7z

Explanation:

3x = 4y and 4y = 21z

It appears that we can say:

3x = 4y = 4y = 21z

3x = 21z

x = 21z/3

x = 7z