How to solve a question with two variables?

Question

X=3Y-6
20Y+35X=3795

Answer 1

you know that x = 3y-6

So, use that in the other equation:

20y + 35(3y-6) = 3795
20y + 105y - 210 = 3795
125y = 4005
y = 32.04

Now use that to find x.

Odd, I expected an integer answer. Check for typos.

Answer 2

Thanks Steve! I couldn't figure out how to put the equations together.