It might be:
y=2x+6+2x-8 (times out the brackets)
y=4x-2
y intercept=-2
The Leading Coefficient Of The Polynomial Is -6

Are you trying to find x, or are you only suppose to translate it?
If you are trying to find x, you first multiply 2x on both sides
100 = 10(2x)
Divide 10 on both sides
10 = 2x
Divide 2 on both sides
5 = x