Multiply entire equation by (x-2)(x+1) to get rid of the denominators That would lead to X(x+1)+(x-1)(x-2)=-1(x-2)(x+1)
Finally, using distributive property and foil, you would get x^2+x+x^2-3x+2=(-x^2+x+2).2x^2-2x+2=-x^2+x+23x^2-3x=0
3x(x-1)x=0 and x=1
6 x 60 x 5 would be the equation and all of that put together would be 1,800 vehicles would pass by in an hour.
I've included two pictures showing steps on how to solve. Hopefully this helps more than words.
20% because the 15-12=3 and then you cross multiply 3 and 100 and then you divide by 15. Which is 20.
3. x
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15 100