Posted by sherry on Tuesday, March 27, 2012 at 1:01am.
Note that, because of the first equation, 16x + 20y = -68. Substitute -68 -20y for 16x in the second equation. -68 -20y -5y = -43 -25y = 25 y = -1 8x -10 = -34 8x = -24 x = -3