Question

Solve using two different methods. Can someone please explain?!

3x - 9y = 3
6x - 3y = -24

Answer 1

one method is to solve by deleting x or y and make one of them alone
the other one is to use substitute : substitute "x as y" or "y as x"

Answer 2

multiply the first equation by -2 and add to the second. you get
\[-6x+18y=-6\]
\[6x-3y=-24\] add to get
\[12y=-30\] so
\[y=-5\] that is one method

Answer 3

ok that was wrong. add to get
\[15y=-30\] so
\[y=-2\]

Answer 4

lololol what?