To eliminate the y-terms and solve for x in the fewest steps, by which constants should the equations be multiplied?

first equation: 5x − 4y = 28

second equation: 3x - 9y = 30

the first equation should be multiplied by 3 and the second equation by 5.
the first equation should be multiplied by 3 and the second equation by −5.
the first equation should be multiplied by 9 and the second equation by 4.
the first equation should be multiplied by 9 and the second equation by −4.