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.
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