Full form of DVX please answer if you don't know leave it ​

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Find two numbers if their sum is 91 and the ratio is 6: 7?