Rational Equations 1

Which of the following sets contains solutions of the rational equation below?

$$\frac{1}{n^2}+\frac{1}{n}=\frac{1}{2n^2}$$

Which of the following sets contains solutions of the rational equation below?

$$\frac{1}{r+2}=\frac{2}{r+3}$$

Which of the following sets contains solutions of the rational equation below?

$$2-\frac{3s}{s+3}=\frac{4}{s+3}$$

Which of the following sets contains solutions of the rational equation below?

$$\frac{c-2}{2c-3}+\frac{3}{2c+3}=\frac{2c^2}{4c^2-9}$$

Which of the following sets contains solutions of the rational equation below?

$$1-\frac{u}{u+4}=\frac{4}{u^2+8u+16}$$