X y 8 2x July 8, 2019 16 32 64 128 X y 8 2x 3y 1 X y 8 2x 3y 6 X y 8 2x 2y 16 X y 8 2x 3y X y 8 2x 3y 19 X y 8 2x 3y 1 by substitution method X y 8 2x 3y 1 by elimination method X y 8 2x 3y 20 X y 8 2x 3y 1 substitution X y 8 2x 3y 21 X y 8 2x y 7 elimination method X y 8 2x y 1 X y 8 2x y 7 X y 8 y 2x 7 graph X y 8 2x y 4