Please help me, I need to know this in the next hour or so

Answer this question, only if you know the answer. 30 points and brainliest!

The sum of two numbers is 12 and their difference is 18 what are the two numbers

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.