Answer:
12+ r = 54
Explanation:
If 54 is the sum, we put it at the end of the equations. Sum means 'the answer to an addition equation' so it must be add ( + )
If we use r to represent Rhonda's height then we have the equation of:
12+ r = 54
NOT PART OF THE QUESTION BUT IF NEEDED:
To figure out Rhonda's height, do 54 - 12= r