Wind turbines convert wind energy into a useful energy like electricity. The formula for wind power is shown below. D stands for density, E for energy efficiency, V for wind velocity and A for windmill area. Which option shows this formula correctly rearranged to solve for wind velocity, V?

Dbecause there are negatives surrounding ding it

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.