" i don't even know how to even start"

Ah, my favorite words. If this is true, you should not be in this class and you should not have been given this assignment.

The idea is to use the same techniques you used to solve the 3000 other problems you have been given before you got to this point. Get x alone - simple as that.

Y = (b+d)/(1-x)

1) Notice that x = 1 would be bad. Why?

2) x in the denominator is no good. How do you get it out? Multiply by 1-x

Y(1-x) = (b+d)

3) Pesky Y is hanging around, attached by multiplication. Divide by it.

(1-x) = (b+d)/Y

You should notice that Y = 0 would be bad, as well. Why?

4) Simplfy

1-x = (b+d)/Y

5) Pesky 1 is hanging around, attached by addition. Subtract it.

-x = [(b+d)/Y]-1

5) Pesky "-" is hanging around, attached by multiplication. Divide by it.

x = -{[(b+d)/Y]-1}

6) Simplify

x = -{[(b+d)/Y]-1} = -[(b+d)/Y]+1 = 1-[(b+d)/Y]

That's about it. You must see that nothing went on here that you have not previously seen. Things are not where we want them, so get them there using appropriate arithmetic.

You do the next one and let's see what you get.