Question

Hey I need help with please show your work

Thank you.

Answer 1

315

Explanation:

→ Substitute the first equation into the second

a + 21a = 330

→ Simplify

22a = 330

→ Solve for a

a = 15

→ Multiply answer by 21

15 × 21 = 315

Answer 2

not my work but I did give you the answer, have a nice day!