Algebra equation: If r = 5z, then 15z = 3y, then r = ?

[MizzHoneyDue]

If r=5z then 15z=3y, then r =

This is how it is worded.

[Mrspi]

If r=5z then 15z=3y, then r = this is how it is worded

I'm going to assume that this is your problem:

If r = 5z and 15z = 3y, then r = ?

r = 5z
Multiply both sides of this equation by 3:

3r = 15z

Now, we know that
3r = 15z and that 15z = 3y

By the transitive property of equality, we can conclude that
3r = 3y

Dividing both sides by 3 yields this:
r = y

If I have misinterpreted your problem, please reply with the exact wording that appears in your text.

[Denis]

If r=5z then 15z=3y, then r = this is how it is worded
15z = 3y ; divide by 3:
5z = y

Since r = 5z, then r = y

MizzHD, your problem should (usually) appear like this:
r = 5z
3y = 15z
What is r in terms of y?
Tell that to your teacher :!: