Question

What does it mean for an equation to express y in terms of x?

Answer 1

It means if the question says express why you have to put it on one side and isolate it from the rest.

Explanation:

Answer 2

This means that one side will have y on its own, and the other will have the variable x along with some coefficients. Basically, if it says express y, you should isolate y

For example, the equation: y=2x+4 follows your description

Hope this helps!