15 points! solve. 1/3r + 1 = −2/3r − 2 drag and drop the answer into the box. a. -3 b. -1/3 c. 2/3 d. 18 r =and !

A. -3 
I know this because 1/3+2/3= 1 which would make the problem r+1=-2. -1+-2=-3

4should be the last one n=4

Hello! mark me brainliest
answer:
congruent segments
step-by-step explanation:
congruent segments. take a line, cut it in half, superipose one half over the other half; you'll have congruence.