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?

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 1

They want you to solve by elimination here

You want to get one of the variables eliminated, which is the variable that you can multiply to get a negative version?

Answer 2

x, i think.

Answer 3

Right
so how to we turn x into -3x?

Answer 4

i wanna say x - 3x but i dont feel like thats right.

Answer 5

Just think about it without connecting both

How would you get from 1 to -3?
(In terms of multiplying)

Answer 6

i think its B. is that correct? i dont have long to do this, i only have an hour.

Answer 7

Right

Answer 8

ok ty