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Answer:
3. x=50, y=80, 4. x=6.5, y=5
Step-by-step explanation:
I think, not entirely sure.
Like terms would be taking all of the ones with a and getting them alone, all of the ones with b alone, and all plain numbers alone to simplify
1) 2a+3-5a+8b
****= -3a+8b+3****
take 2a-5a and that is your answer
2) 6a+rs-4a+6rs
=2a+rs+6rs
combine the a's 6a-4a
****=2a+7rs****
1rs+6rs combine rs's and that's it :)
**** is the answers

According to above figure, we can conclude that :
- The given triangles are congruent by SSS criteria.