Answer:
D.
Step-by-step explanation:
In order to eliminate, the numbers must eliminate. If the second equation is multiplied by 3, then the 3 and the -3 can be eliminated. Since it is multiple choice, we can plug in x = 12 and y = 10 to see if they are correct. 12 + 30 = 42 and 24 - 10 = 14, so D is correct.
4+4+6+6=12+8=20
hope this helps
Hello,
Please, see the detailed answer in the attached files.
Thanks.
Answer:
-45
Step-by-step explanation: