Me plz 15 points on the line plz and you give good answer

So he dives below so the integer will be negative. It is -18. So to return to the surface he need to swim up to 18 meters. Hope you understand my answer.

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!