2 is Reflexive property
4 is (I don't remember the specific property of this)
C) 250 is the right answer
It's C I'm pretty sure and this in English not math
Answer: 3
Step-by-step explanation:
Distribute the 5: 15x-5=40
Add 5 from both sides: 15x=45
Divide 15 by both sides: 3