Answer:
Option D
Step-by-step explanation:
(8x^2-9y^2-4x) +(x^2-3y^2-7x)
8x^2+x^2-9y^2-3y^2-4x-7x
9x^2-12y^2-11x
The initial equation is:

Let's transform it for x:

... distract 5:

... divide both sides by 5:
The correct way to write 1/4% as a decimal is 0.0025.
The reporter's likely error was that he did not notice the percent sign, thus saying that 1/4% is equivalent to 0.25.
Supplementary angles must add up to 180 degrees.
3x-12=180
x=64 degrees