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weeeeeb [17]
3 years ago
14

Can anyone help with this please !!!!

Mathematics
1 answer:
makvit [3.9K]3 years ago
6 0

Answer:

"Add equations A and B to eliminate y. Add equations A and C to eliminate y".

Step-by-step explanation:

Let be the following system of linear equations:

4\cdot x + 4\cdot y + z = 24 (1)

2\cdot x - 4\cdot y +z = 0 (2)

5\cdot x - 4\cdot y - 5\cdot z = 12 (3)

1) We eliminate y by adding (1) and (2):

(4\cdot x + 2\cdot x) +(4\cdot y - 4\cdot y) + (z + z) = 24 + 0

6\cdot x +2\cdot z = 24 (4)

2) We eliminate y by adding (1) and (3):

(4\cdot x + 5\cdot x) +(4\cdot y - 4\cdot y) +(z -5\cdot z) = (24 + 12)

9\cdot x -4\cdot z = 36 (5)

Hence, the correct answer is "Add equations A and B to eliminate y. Add equations A and C to eliminate y".

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