Question

The question is the image

Answer 1

3 + 2 - 4 (1) = 1

3 + 4 (2) + 1 = 12

3 - 3 (2) - 2 (1) = -5

Explanation:

a = 3, b = 2, c = 1

- If we replace the letters with the numbers, the system is true.

Example:

1. a + b + 4c = 1: after replacing we get 3 + 2 - 4 (1) = 1, if we calculate the left side we find that it's 1, so we get 1 = 1
2. 3 + 4 (2) + 1 = 12, we also get 12 = 12
3. 3 - 3 (2) - 2 (1), we also get -5 = -5

So the system is true and (3, 2, 1) is a solution to the system.