Question

To eliminate the terms and solve for y in the fewest steps, by which constants should the equations be multiplied by before adding the equations together? First equation: 9x + 3y = -18 Second equation: 8x + 7y = 10 The first equation should be multiplied by 3 and the second equation by 7. The first equation should be multiplied by -3 and the second equation by -7. The first equation should be multiplied by - 7 and the second equation by 3 . The first equation should be multiplied by -7 and the second equation by -3.

Answer 1

C. The first equation should be multiplied by - 7 and the second equation by 3

Explanation:

Answer 2

The first equation should be multiplied by - 7 and the second equation by 3

Explanation:

Indeed, let s multiply the first equation by -7

-7*9x-7*3y=7*18

and the second one by 3

3*8x+3*7y=3*10

when we add both the terms in y will be -7*3y+3*7y= 0

and then we can solve on x

hope this helps