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Solve using elimination 2x-3y=9 and -5x-3y=30

 Mar 9, 2021
 #1
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2x - 3y = 9                 ...(1)

-5x - 3y = 30              ...(2)

Subtracting (1) from (2)

     -5x - 3y = 30

-     2x - 3y = 9

       -7x       = 21

          x      = -3

 Mar 9, 2021
edited by amygdaleon305  Mar 9, 2021
 #2
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$2x-3y=9, -5x-3y=30$

$(2x-3y)-(-5x-3y)=-21,$

$7x=-21$

$\boxed{x=-3,y=-5}$

 Mar 9, 2021

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