Question 147689
Multiply the second equation by -3 to be able to eliminate y.  You should get {{{-6x-3y=-24}}}.  Add all that to the first equation and get {{{9x=-36}}}. So x=-4.  So plug that in to the second ORIGINAL equation and get {{{2(-4)+y=8}}}.  {{{-8+y=8}}}. So y=16.  To check, plug them both in to either equation. {{{15(-4)+3(16)=-12}}}. {{{-60+48=-12}}}. It's true, so x=-4 and y=16.