Which statements are necessary to prove the two triangles are congruent by SSS?

(9x-5) - (x+12) what’s the answer and also explain how to do it i need it for a test tomorrow

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .