Y= 3 which would be choice A, because both equations are going to be set equal to eachother, so with that you would put

subtract 5y from 7y, and add the 3 from the left to the 3 on the right. this would leave you with 2y=6 so in this case you would divide both sides by two to get the answer of 3 which is choice A.
Plug in 5 for y, and 3 for x
(3(5) - 3) + (3)
First, multiply
5 x 3 = 15
Next, subtract
15 - 3 = 12
Finally, add
12 + 3 = 15
15 is your answer
hope this helps
Answer:
8 and 4
Step-by-step explanation:
8+4=12
8-4=12
Answer: can you be more explicit?
Explanation: ??