Y 7 3y 9 July 8, 2019 16 32 64 128 3x y 7 x 3y 9 2 7 3y 9 y 2 1 10 2 y 7 )= 3y 9 X y 7 2x 3y 9 X y 7 2x 3y 9 by graphical method X y 7 2x 3y 9 substitution method Y 1 7 3y 11 9 5y 6 X y 7 2x 3y 9 by cramer's method 2x y 7 4x 3y 9 Solve x y 7 2x 3y 9 Y 3x 7 21 9x 3y Y 4 4 3y 9 7 1 2
