Question

Given the system of equations presented here:

3x + 5y = 29
x + 4y = 16

Which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated?

Answer 1

Multiply the second equation by −1 to get −x − 4y = −16
Multiply the second equation by −3 to get −3x − 12y = −48
Multiply the first equation by −1 to get −3x − 5y = −29
Multiply the first equation by −3 to get −9x − 15y = −87

Answer 2

you can multiply the second equation by -3 to eliminate the x's