In the following equations, what would you multiply the second equation to eliminate the "x"? *(Giving Brainliest)

3x + y = 20
x + y = 12

1) -1

2) 1

3) -3

4) 3

-3

Step-by-step explanation:

ha!

i just did this!

18. g

20. h 30 degree turn.

21. d 90 degree angles

and also 19 is a. a sphere not a cirlcle

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c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.