at the beginning of the week eito bought 18 pounds of rice in 2 pound bags at the end of the week he had 4 pounds left how many 2 pound bags did he use?

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