Question 1136760
the two equations are:


-4x + 2y = 16
8x -2y = -40


add the two equations together to get 4x = -24


solve for x to get x = -6


replace x with -6 in the first equation to get -4 * -6 + 2y = 16


simplify to get 24 + 2y = 16


subtract 24 from both sides to get 2y = 16 - 24


simplify to get 2y = -8


solve for y to get y = -8 / 2 = -4


you have:


x = -6
y = -4


replace x and y in both original equations by -6 and -4.


the two original equations are:


-4x + 2y = 16
8x - 2y - -40


after replacement, these equations become:


-4 * -6 + 2 * -4 = 16 becomes 24 - 8 = 16 which becomes 16 = 16.


8 * -6 - 2 * -4 = -40 becomes -48 - (-8) = -40 which becomes -48 + 8 = -40 which becomes -40 = -40.


the solutions are confirmed to be good.


the solutions are x = -6 and y = -4