A system of linear equations is shown below. 2x + 4y = 10 3x – y = 8 marla is attempting to prove that by replacing 2x + 4y = 10

Question

Colt1911 [192]

3 years ago

14

A system of linear equations is shown below. 2x + 4y = 10 3x – y = 8 marla is attempting to prove that by replacing 2x + 4y = 10

with a different equation it will sometimes produce a new system of equations with the same solution. marla plans on multiplying 2x + 4y = 10 by 2 and then adding the results to the equation 3x – y = 8 in order to create a new equation. marla claims that the new equation that she will replace 2x + 4y = 10 with is 7x + 7y = 12. is marla correct?

Mathematics

1 answer:

Kazeer [188] · Answer 1 · 2022-05-14T17:33:56+03:00

Kazeer [188]3 years ago

3 0

2(2x +4y) +(3x -y) = 2(10) +(8)
.. 7x +7y = 28

Marla has incorrectly calculated the constant as 12. It should be 28.