Two times one number added to three times a second number is 21. Five times the first number added to three times the second is 30. What are the numbers?

Answer:
d. 3 and 5
Step-by-step explanation:
the first number will be x and the second number will be y
2x + 3y = 21
2(3) + 3(5) = 21
6 + 15 = 21
5x + 3y = 30
5(3) + 3(5) = 30
15 + 15 = 30