I don't like these computer choice thingies. It detracts from the math.


If we want to eliminate x we multiply the first equation by 5 then add it to the second:



OK, that's how it's done. Reading through the choices, that's choice D.
Answer:
36
Step-by-step explanation:
Because the bases are the same we can just subtract the exponents to get us 6² or 36.
6 units down. Because you have to go from 3 to 0 which is 3 and from 0 to -3 which is another 3. 3+3=6 :)