Hi im sorry to ask for help but im really stressed about this IN OWN WORDS PLEASE. and sorry to add more but please no scam<3​

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

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Asap! i'm not good math and i'm lost.