The answer to this question is 30
X1 = 12
X2 = 4
I took the test and can promise you this is correct!!
Answer:

Step-by-step explanation:











Answer:
Part 1) 
Part 2) 
Step-by-step explanation:
Part 1) we have
----> equation A
----> equation B
substitute equation B in equation A

Applying property of exponents



therefore

Part 2) we have
----> equation A
----> equation B
substitute equation B in equation A

Applying property of exponents



simplify

therefore
