4 2x 4y July 8, 2019 16 32 64 128 4 2x 4y 5z 4 2x 4y 3y 2x 4 4y 2 X 2y 4 2x 4y 8 2x 4y 4 in slope intercept form 4 x y 2 2x 4y 2x 4y 4 0 2y 4 2x 4y 3 Xy 4 2x 4y 20 4 2x y )+ 4y X 2y 4 2x 4y 12 by substitution method X 2y 4 2x 4y 8 represents X 2y 4 2x 4y 12 X 2y 4 2x 4y 12 by elimination method X 2y 4 2x 4y 12 graph