how do i find the missing endpoint

Question

find the missing coordinates of A if M(-1,2) is the midpoint of segment AB and B has the coordinates of (3,-5)

pls help me solve this couldn't understand also when you solve this make sure you do it step by step in order for me to find how you solved the problem thank you

Answer 1

If a line segment has endpoints (x₁,y₁) and (x₂,y₂),

the x co-ordinate of the midpoint is (1/2)(x₁ + x₂) and

the y co-ordinate is (1/2)(y₁ + y₂).

You should be able to answer the question with this information.